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CONTENTSSelection, Application, Maintenance . . . . . . . .21-1Tire Construction . . . . . . . . . . . . . . . . . . . . . . .21-2

Bias Ply . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-2Radial Ply . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3

Tire Types . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-3Tire Size Nomenclature . . . . . . . . . . . . . . . . . .21-3Code Identification for

Off-Highway Tires . . . . . . . . . . . . . . . . . . . . .21-4Manufacturers’ Designations —

Firestone, Goodyear, Dunlop,Bridgestone, Michelin . . . . . . . . . . . . . . . .21-5

Triangle, Eurotire, Yokohama, Belshina . . .21-7Firestone, Goodyear, Dunlop,

Bridgestone, Michelin . . . . . . . . . . . . . . . .21-8Triangle, Eurotire, Yokohama . . . . . . . . . .21-10Nokian, Belshina, Pirelli . . . . . . . . . . . . . .21-10

Radial Tire Identification:Michelin . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-11Goodyear . . . . . . . . . . . . . . . . . . . . . . . . . . .21-12Bridgestone . . . . . . . . . . . . . . . . . . . . . . . . .21-13

Ton-Kilometer Per Hour Rating System . . . .21-14Tire Drive-Away Recommendations . . . . . . .21-15TKPH Ratings

— Goodyear Radial Ply . . . . . . . . . . . . . . . .21-16— Bridgestone Radial Ply . . . . . . . . . . . . . .21-19— Michelin Radial Ply . . . . . . . . . . . . . . . .21-22

Tire and Rim Association Ratings . . . . . . . . .21-26Tire Selection . . . . . . . . . . . . . . . . . . . . . . . . .21-26

Guide . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .21-28Standard Cold Inflation Pressures . . . . . . .21-29

Liquid Ballasting Table . . . . . . . . . . . . . . . . .21-43

SELECTION, APPLICATION, MAINTENANCEProper tire selection, application and maintenance

continue to be the most important factors in earth-moving economics. Wheel tractors, loaders, scrap-ers, trucks, motor graders, etc. are earthmovingequipment whose productivity and payload unit costmay depend more on tire performance than anyother factor.

Off-the-road tires must operate under a wide vari-ety of conditions ranging from dry “potato dirt”through wet severe shot rock. Speed conditions varyfrom less than 1 mph average to 72 km/h (45 mph).Gradients may vary from 75% favorable to 30%adverse. Climatic conditions, operator skills, main-tenance practices, etc. all may have a profound effecton tire life and unit costs.

Although one specific tire construction may beacceptable in a variety of applications, no one tirecan meet all requirements on any one machine andperhaps not even one job. The many differences intire requirements on earthmoving machines haveresulted in a wide variety of tread and casing designsbeing made available. The optimum tire selectionfor a specific machine on a given job should be ajoint deci sion between the user and tire supplier.Several tire manufacturers have technical and appli -cation representatives in the field for proper guid-ance in tire selection.

When job conditions change, it may be desirableto select a different tire configuration to meet thenew requirements.

TIRES

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EPHB-Sec21-11:EPHB-Sec21-11 10/26/10 1:04 PM Page 1

TIRE CONSTRUCTIONThe pneumatic tire is essentially a flexible pres-

sure vessel utilizing structural members (nylon,steel cable, etc.) to contain the hoop tension result-ing from the inflation pressure. Rubber is utilized asa protective coating and sealant over the structuralmembers and makes up the tread pattern whichprovides the wearing medium at the ground inter-face. The following brief explanation of the varioustire constructions will assist you in selecting tiresfor your specific application.

Two distinct tire constructions approved on allCat machines are the BIAS PLY and RADIAL PLYtires. Radial tires are designated by an “R” while a“-” represents a Bias constructed tire. For example,a 45/65-45 tire would be of Bias construction and a45/65R45 would be of Radial construction. The fol-lowing is a brief explanation of the principal fea-tures of these two constructions.

Bias Ply1. Beads — The tire beads consist of steel wire-

bundles (3 or 4 in larger tires) which are forcedlaterally by tire inflation pressure to wedge thetire firmly on the rim’s tapered bead seat. Thenylon plies tie into the bead bundles. The forcesinherent in the tire are transmitted from the rimthrough the bead bundles into the nylon.

2. Body plies — Layers of rubber-cushioned nyloncord comprise the tire casing. Alternating pliesof cord cross the tread centerline at an angle(bias). The term “ply rating” is an index of tirestrength and not the actual number of tire plies.

3. Breakers or tread plies — These, if used, are con-fined to the tire’s tread area and are intended toimprove casing strength and provide additionalprotection to the body plies. Some “work” tiresemploy steel breakers or belts to further protectthe casing.

4. Sidewalls — These are the protective rubber lay-ers covering the body plies in the sidewall.

5. Tread — The wearing part of the tire that con-tacts the ground. It transmits the machine weightto the ground and provides traction and flotation.

6. Inner liner — This is the sealing medium thatretains the air and, combined with the “O” ringseal and rim base, eliminates the need for innertubes and flaps.

7. Tubes and flaps (not shown) — Required if thetire is not of tubeless construction with an innerliner.

8. Undertread — Protective rubber cushion lyingbetween tread and body ply.

21-2 Edition 41

Tires Tire Construction● Bias Ply

Bias Ply Construction


Radial Ply

1. Beads — A single bead bundle of steel cables orsteel strip (spiraled like a clock spring) comprisethe bead at each rim interface.

2. Radial casing — This consists of a single layeror ply of steel cables laid archwise (on the radian)bead to bead.

3. Belts — Several layers or plies of steel cable formthe belts which underlie the tread area aroundthe tire circumference. The cable in each beltcrosses the tread centerline at an angle with theangle being reversed from the preceding belt.

4. Sidewalls.

5. Tread.

6. Undertread — Protective rubber cushion lyingbetween tread and steel belts.

Bias and Radial Tire AdvantagesBias Radial

Tread Life XHeat Resistance XCut Resistance — Tread XCut Resistance — Side Wall X XTraction XFlotation XStability XFuel Economy XRepairability X

TIRE TYPESOff-the-road tires are classified by application in

one of the following three categories:

1. Transport tire — For earthmoving machines thattransport material such as trucks and wheeltractors.

2. Work tire — Normally applied to slow moving earth-moving machines such as graders and loaders.

3. Load and carry — Wheel loaders engaged intransporting as well as digging.

TIRE SIZE NOMENCLATURETire size nomenclature is derived from the approx-

imate cross section width and rim diameter typi-cally in the format of Tire Width, Aspect Ratio, andRim Diameter (example: 45/65-45). Available tiretypes include:

1. A wide base tire has a section height to sectionwidth ratio in the range of 0.83. As an example,a 29.5-25 tire has an approximate cross sectionwidth of 749 mm (29.5") (first number) and a rimdiameter of 635 mm (25") (second number).

2. A conventional tire has a section height to sec-tion width ratio in the range of 0.96. As an exam-ple, a 24.00R35 tire has an approximate crosssection width of 610 mm (24") (first number) anda rim diameter of 889 mm (35") (second number).

3. A low profile tire has a section height to sectionwidth ratio in the range of 0.65. As an example,a 45/65-45 tire has an approximate cross sectionwidth of 1143 mm (45") (first number), a 65% aspectratio designated as 65 (second number), and arim diameter of 1143 mm (45") (third number).

If designated 45/65 R39, then the R denotesradial construction.

When comparing a wide base tire to a standardbase tire, a larger first number on a wide base tirewith the same rim diameter does not mean the widebase is larger in overall diameter. For example, the18.00-25 conventional tire is larger in diameter thanthe 20.5-25 wide base tire. The 18.00-25 is compara-ble in overall diameter to the 23.5-25 wide base tire.

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TiresTire Construction● Radial

Tire TypesTire Size Nomenclature

Radial Ply Construction


D = Tire Overall DiameterR = Nominal Rim DiameterH = Tire Section HeightS = Tire Section WidthW = Tire Width (includes ornamental ribs)H = Aspect RatioS

CODE IDENTIFICATION FOR OFF-HIGHWAY TIRES

The tire industry has adopted a code identifica-tion system to be used for off-the-road tires. Thisidentification system will reduce the confusioncaused by the trade names for each type of tireoffered by each tire manufacturer. The industry codeidentification is divided into six main categories bytypes of service as follows:

C — Compactor ServiceE — Earthmover ServiceG — Grader ServiceL — Loader and Dozer ServiceLS — Log-Skidder ServiceF — IndustrialR — Agricultural TractorI — Agricultural Implement

The sub-categories are designated by numerals,as follows:

Code Identification

% TreadCompactor Depth

C-1 Smooth 100C-2 Grooved 100

EarthmoverE-1 Rib 100E-2 Traction 100E-3 Rock 100E-4 Rock Deep Tread 150E-7 Flotation 80

GraderG-1 Rib 100G-2 Traction 100G-3 Rock 100G-4 Rock Deep Tread 150

Loader and DozerL-2 Traction 100L-3 Rock 100L-4 Rock Deep Tread 150L-5 Rock Extra Deep Tread 250L-3S Smooth 100L-4S Smooth Deep Tread 150L-5S Smooth Extra Deep Tread 250L-5/L-5S Half Tread Extra Deep 250

Log-SkiddersLS-1 Regular Tread 100LS-2 Intermediate Tread 125LS-3 Deep Tread 150HF-4 Extra Deep Tread 250

IndustrialF-3 Traction Tread

Agricultural TractorR-1 Regular TreadR-3 Shallow TreadR-4 Industrial Tractor

Agricultural ImplementI-3 Tractor Tread

21-4 Edition 41

Tires Off-Highway Tire Identification Codes

Tire cross-section


Tire and Rim GOODYEARAssoc. Code Tread Type FIRESTONE DUNLOP BRIDGESTONE MICHELIN

Compactor

C-1 Smooth Compactor SMC-1A RR COMPACTEURC-2 Grooved Compactor AL2

Earthmover

E-1 RIb HRR-1AXDR-1A

E-2 Traction Super Ground Grip GP-2B VKT XGCGP-3D VSB X-CRANEAT-2 VHB XMH (S)AT-2A VFT XSNOPLUS 170ERL-2F VHS XSSGL-2A VSW XR

XTLAE-3 Rock Super Rock Grip GP-2B VLT XK

E67 GP-3D VMT XRHRL-3A VJT XMSHRL-3B VEL XHHRL-3C VRL XADNHRL-3F VRD XAD65-1 SUPER E3RL-3 VRF X-TRACTION RD SRL-3+ WL XTSRL-3A RL XDMRL-3F X-STRADDLERL-3JRM-3ART-3ART-3BWRL-3A

E-4 Rock Deep Tread Super Rock Grip GP-4B VLTS XDTDeep Tread GP-4B AT VSNT XDR

GP-4D VMTS XRSGT-4B VMTP XADTHRL-4A VZTS X SUPERHRL-4B VZTP TERRAIN ADMRL-4B, F VELSL XDMRL-4 VELS XHAULRL-4A VRLS XHAUL SRL-4B VRDP XHD1RL-4F VRPS XKD1RL-4H VRQP X-QUARRYRL-4HII RLS X-QUARRY SRL-4J ELS2 X-TRACTION RDRL-4JIIRL-4LRL-4M+RM-4A+RT-4A

E-5 Rock ExtraDeep Tread

E-7 Flotation EAW-7A VSJSAW-7A SCP2SHY-7ASR-7ASRB-7ASRB-7A, 7B

Edition 41 21-5

21

TiresManufacturer’s Designation



Grader

G-1 Rib RBG-IA RGG-2 Traction Super Ground GP-2B FG XTL

Grip Road Builder GP-3D GL X SNOPLUSAS-3A VKT XGLA2ASG-2A VSW XRAT-2A VUTRL-2+RL-2FSG-2ASG-2BSGG-2ASGL D/L-2A

G-3 Rock GP-2B RL XHGP-3D XLD L3HRL D/L-3ARKG-3ARKG-3CRL-3JRT-3B

G-4 Rock Deep Tread Super Rock Grip GP-4B XLD D1Deep Tread GP-4B AT XLD SUPER L3Road Builder GP-4D

SGG-4BG-5 Rock Extra HRL D/L-5A XLD D2

Deep Tread

Soil Compactor

R-1 Regular Tread Super All Traction IISuper All Traction

R-3 Shallow Tread All Non-Skid Tractor SFT105

21-6 Edition 41

Tires Manufacturer’s Designation


Tire and RimAssoc. Code Tread Type TRIANGLE EUROTIRE YOKOHAMA BELSHINA

Compactor

C-1 Smooth CompactorC-2 Grooved Compactor

Earthmover

E-1 RibE-2 Traction TM518

TL508E-3 Rock TB516 Y67

RB31E-4 Rock Deep Tread Y11 FT-116AM

U11 BEL-102U12 FT-117U14 FT-115

E-5 Rock ExtraDeep Tread

E-7 Flotation

Grader

G-1 RibG-2 Traction TL508G-3 RockG-4 Rock Deep TreadG-5 Rock Extra

Deep Tread

Edition 41 21-7

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21-8 Edition 41



Log Skidder

LS-1LS-2 Intermediate Forestry TGS

Special CRCForestry Special

Severe ServiceLS-3 DeepHF-4 Extra Deep

Loader and Dozer

L-2 Traction Super Ground GP-2B VUT XLTGrip LD GP-3D VKT XGL 2

AT-2 VSW XFAT-2A GL X SNOPLUS M&SRL-2F FG XMCASGL D/L-2ASPT9ET91ET91-2

L-3 Rock Super Rock Grip LD GP-2B VLT XH AGP-3D VMT XH A2ELV-3A VJT XLD L3HRL D/L-3A VTS XKAHRL D/L-3B RL XZSLHRL D/L-3C VL2HRL-3ARL-3RL-3FRL-3JRT-3B

L-4 Rock Deep Tread Super Rock Grip AMS VLTS XKD1Deep Tread LD DMS D/L-4/15C VSNT XLD D1

AMS-4/5A VSNL XLD SUPER L3GP-4B RLSGP-4B AT NLGP-4CGP-4DHRL D/L-4/15CHRL D/L-4AHRL D/L-4GNRL D/L-4ANRLNDL D/L-4/15CRL-4K


Edition 41 21-9

21



Loader and Dozer (cont’d)

L-5 Rock Extra Super Deep AMS D/L-5/8H VSDT XLD D2Deep Tread Tread LD AMS D/L-5/9A VSDL X MINE D2

AMS DLDMS D/L-4/15CAMS-5/11FAMS-5/15CAMS-5/8FDRL D/L-5AHRL D/L-5AHRL D/L-5BNRL D/L-5ANRLNDL D/L-5/15CRL-5C,E,FRL-5KRL-5SRT-5C

L-3S Smooth Tread Plain Tread LD SM-3ASMO D/L-3A

L-4S Smooth Deep Tread Plain Tread LD NSM D/L-4BSMO D/L-4A,

B SMO-4BL-5S Smooth Extra Plain Tread LD NSM D/L-5B VSMS XSMD 2

Deep Tread Plain LD UMS SM-5A STMSSMO D/L-5A, BSMO-5A, B, C

L-5/L-5S Half Smooth Half Tread LD DL2

Backhoe Loader

F-3 Industrial Multiple- Industrial SpecialRib Tread

I-3 Traction Tread Super TractionLoader

R-4 Drive Wheel, All Traction Utility SG Lug XMCLIndustrial IT525Tractor Tread Industrial Sure Grip


Tire and RimAssoc. Code Tread Type TRIANGLE EUROTIRE YOKOHAMA

Log Skidder

LS-1LS-2 IntermediateLS-3 DeepHF-4 Extra Deep

Loader and Dozer

L-2 Traction TL508L-3 Rock TB516 F-220 RB31

TL612L-4 Rock Deep Tread Y524L-5 Rock Extra Deep Tread Euro 50

L-3S Smooth TreadL-4S Smooth Deep TreadL-5S Smooth Extra

Deep TreadL-5/L-5S Half Smooth

Tire and RimAssoc. Code Tread Type NOKIAN BELSHINA PIRELLI

Log Skidder

LS-1LS-2 IntermediateLS-3HF-4

Loader and Dozer

L-2 Traction Loader Grip TLL-3 RockL-4 Rock Deep Tread FBEL-283 RM99L-5 Rock Extra Deep Tread

L-3S Smooth TreadL-4S Smooth Deep TreadL-5S Smooth Extra

Deep TreadL-5/L-5S Half Smooth

21-10 Edition 41



Edition 41 21-11

21

TiresRadial Tire Identification● Michelin

RADIAL TIRE IDENTIFICATION

Code Identification for Michelin TiresAll Michelin earthmover tires are radial construc-

tion, designated by the “X” marking. They contain asingle steel radial ply with a series of steel beltsplaced around the tire’s circumference which rein-force and stabilize the tread.

Following are the tread designs currently avail-able from Michelin with the different internal con-structions depending on the application.Type A4 Particularly resistant to cuts, tread tear-

ing and abrasion on very rough surfaces.Type A Particularly resistant to cuts, tread tear-

ing and abrasion at average speeds whichare higher than those for A4 (above).

Type B4 Compromise solution between abrasionresistance and average speed on roughsurfaces (available in sizes 49 inch rimdiameter and above).

Type B Higher resistance to internal heat gener-ation on surfaces which are not particu-larly rough.

Type C4 For running on long cycles at high speedson well maintained roads.

Type C Very high resistance to high average speedson long cycles run on well maintained roads.

The current combinations of tread patterns, con -struction, and tread depths offered, and primaryTRA codes are:

PrimaryTread Tread Compounds TRA Design Type A4 Type A Type B Type C Code(s)X MINE D2 X L-5XAD 65-1 X E-3XADN X E-3XADT X E-4XDC X X E-3XDM X X E-3, E-4XDR X X X X E-4XDT X X X X E-4XGLA2 X G-2, L-2XH X G-3, E-2,

E-3X-HAUL X E-4XK X X E-3XKD1 X X X E-4XLD X G-3, L-3XLD D1 X L-4XLD D2 X L-5XLISSE C-1XMH X E-2XMS X X E-3X-QUARRY X E-4XR X X E-3, L-3XRS X E-4XSMD2+ X L-5SXSNOPLUS X L-2, G-2XTL X G-2, L-2X-TRACTION

RD (X) X E-4XTS X E-3

Since Michelin radial tires contain a single steelcasing ply, they utilize the industry method of des-ignating radial tire strength in terms of “stars.” Theirsystem consists of a one star, two star, and three starrating as an indication of the tire’s carrying capacity.The one star is the lightest construction, generallyused on work and slow moving transport machines.Two star tires are used on most medium and highspeed transport machines. Three star constructionprovides the greatest carrying capacity for a givensize and is only available in small standard base tires.

This combination of tread designs and types of con-struction provides a range of radial tires which covermost earthmoving applications. We recommend thatin applying steel radial tires to your machines youprovide all site condition data to the tire manufac-turer. Obtain their recommendations as to which tirewill provide the most economical operation.


21-12 Edition 41

Tires Radial Tire Identification● Goodyear

Code Identification for Goodyear Radial TiresAll Goodyear steel radial earthmover tires have

been designated Unisteel followed by a three or fourdigit alpha-numeric code that identifies the partic-ular tread. For example, for a RL-2+, RL stands forRock Lug and indicates that the upper sidewall hasrock protection. The number in the code correspondsto the tire industry identification system (2-traction,3-rock, etc). The fourth digit, if any, is used to des-ignate tread design differences for the same basictread type.

Following are the radial tread designs currentlyavailable from Goodyear with the compound andconstruction types depending on the application.

Compound Description Compound CodeHeat Resistant 2Standard Abrasion Resistant 4Ultra Abrasion Resistant 6

Construction Description Construction CodeStandard SHeavy Duty HExtra Heavy Duty HWSteel Breakers JHeavy Undertread ULow Angle Belts SL

Compound Code

Tread Design 2S 4S 6S Primary TRA Code(s)AT-2A X X X E-2, L-2, G-2GP-2B X X X E-2, E-3, G-2, G-3,

L-2, L3GP-3D X X X E-2, E-3, G-2, G-3,

L-2, L-3GP-4B AT X X X E-4, G-4, L-4GP-4D X X X E-4, G-4, L-4GT-4B X X X E-4RL-2+ X X X G-2RL-2F X X X E-2, G-2, L-2RL-3 X X X E-3, L-3RL-3+ X X X E-3RL-3A X X X E-3RL-3F X E-3, L-3RL-3J X X X E-3, G-3, L-3RL-4 X X X E-4RL-4A X X X E-4RL-4B X X X E-4RL-4F X X X E-4RL-4H X X X E-4RL-4HII X X X E-4RL-4J X X X E-4RL-4JII X X X E-4RL-4K X X L-4RL-4M+ X X X E-4RL-5K X X L-5RM-3A X X E-3RM-4A+ X X X E-4RT-3A X X E-3RT-3B X E-3, G-3, L-3RT-4A X X X E-4

A star rating system instead of the ply rating sys-tem indicates the casing strength of radial tires.These symbols indicate the recommended inflationfor a particular tire load. Following the star ratingcode is Goodyear’s Custom Compound and Construc -tion code. For a tire designated “2S” the 2 indicatesa heat resistant compound and the S indicates stan-dard construction. The higher the number the greaterthe abrasion and cut resistance with a correspondinglower TKPH/TMPH rating.


Edition 41 21-13

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TiresRadial Tire Identification● Bridgestone

Code Identification for Bridgestone Radial TiresThe Bridgestone steel radial earthmover has been

designated as V-Steel. Following are the radial treaddesigns currently available from Bridgestone withthe compound and construction types depending onthe application.Bridgestone Compound and Structure Codes1A Standard2A Cut-Resistant2V Special Cut Resistant (Steel Breaker)2Z Special Cut Resistant (Side Steel Breaker)3A Heat-Resistant

E EarthmoverG GraderD Loader and DozerS Logging

Compound/

Tread Structure Codes TRADesign Tread Name 1A 2A 2V 2Z 3A Code(s)VEL V-Steel E-Lug X E-3VELS V-Steel E-Lug S X X X E-4VELSL V-Steel E-Lug S

(Long Haul) E-4VFT V-Steel F-Traction X X E-2VHB V-Steel H-Block E-2VHS V-Steel H-Service E-2VJT V-Steel J-Traction E-3, L-3VKT V-Steel K-Traction X X E-2, G-2, L-2VLT V-Steel L-Traction X X E-3, L-3VLTS V-Steel L-Traction S X E-4, L-4VMT V-Steel M-Traction X X X E-3, L-3VMTP V-Steel M-Traction

Premium X X E-4VMTS V-Steel M-Traction S X X X E-4VRD V-Steel Rock Deep X X E-3VRDP V-Steel Rock Deep

Premium X X X E-4VRF V-Steel Rock Fast E-3VRL V-Steel R-Lug X X X E-3VRLS V-Steel R-Lug S X X X E-4VRPS V-Steel Rock

Premium Service E-4VRQP V-Steel Rock

Quarry Premium X E-4VSB V-Steel S-Block X X E-2VSDL V-Steel D-Lug X L-5VSDT V-Steel Super

Deep Traction X L-5VSJ V-Steel Jamal E-7VSMS V-Steel Smooth

Tread-MS X X L-5SVSNL V-Steel N-Lug X L-4VSNT V-Steel N-Traction X E-4, L-4VSW V-Steel Snow Wedge X E-2, G-2, L-2VTS V-Steel Traction-

Stability X L-3VUT V-Steel U-Traction X G-2, L-2VZTP V-Steel Z-Traction

Premium E-4VZTS V-Steel Z-Traction S X X X E-4

The casing strength, i.e., load carrying capacityof tire is indicated by star rating system; 1-star, 2-starand 3-star. Bridgestone’s Off-the-Road tires aredesigned and produced to meet the commonly acceptedinternational standards, those set by the TRA (Tireand Rim Association) in the U.S.A., by the ETRTO(European Tire and Rim Technical Organization) inEurope and/or by the JATMA (Japan AutomobileTire Manufacturers’ Association) in Japan. Wheredifferences exist between the TRA, ETRTO andJATMA standards, Bridgestone selects the mostappropriate.


TON-KILOMETER PER HOUR (TKPH)Tire selection and machine operating practices

have, in some cases, become the critical factors inthe over-all success of earthmoving ventures. Oneof the most serious problems occur when tires areoperated at temperatures above their capabilities.Separa tion and related failures occur. To help youavoid temperature related failures, Caterpillar hasbeen instru mental in developing the Ton-KilometerPer Hour (TKPH), also known as Ton-Mile Per Hour(TMPH), method of rating tires. The formula to con-vert a TKPH rating to a TMPH rating is:

TMPH = TKPH � 0.685

Heat and Tire FailureTire manufacturing requires heat in the vulcan-

izing process converting crude rubber and additivesinto a homogeneous compound. The heat required istypically above 132° C (270° F).

A tire also generates heat as it rolls and flexes.Heat generated faster than it can be radiated intothe atmosphere gradually builds within the tire andreaches maximum level at the outermost ply or belt.

Over time, enough heat can develop from overflexingto actually reverse the vulcanizing process or “revert”the rubber causing ply separation and tire failure.Only a brief time at reversion temperature initiatesthe failure. Experience shows that few pure heat sep -aration cases occur. Most so-called heat separationsare in tires operating below the reversion level.

As a tire’s operating temperature increases the rub-ber and textiles within significantly lose strength. Thetire becomes more susceptible to failures from cor-nering, braking, impact, cut through, fatigue and heatseparation. If operating tires at higher tempera turesis absolutely necessary, it is essential the machinesbe operated to reduce the probability of prematuretire failure. No hard cornering without supereleva-tion, no panic braking, etc.

The TKPH formula was developed to predict tiretemperature buildup. The system is a method of rat-ing tires in proportion to the amount of work they cando from a temperature standpoint. It utilizes theproduct of load � speed to derive an index of the tiretemperature buildup. Even at or below a tire’s TKPH,failures may be initiated by overstressing the tires.

It is possible by using a needle type pyrometer tomeasure temperature at any desired point withinthe tire casing. However, the instrumentation andthe technique does not lend itself to general fielduse. The greatest difficulty is locating the thickest(therefore the hottest) tread bar in any given tireusing giant calipers. The tire must then be drilledalong the centerline of this bar from shoulder toshoulder at 52 mm (2") intervals. These 3.18 mm(1/8") diameter holes extend down through the treadand undertread to the topmost reinforcement. Thisprocedure is fully described under SAE Recommendedpractice J1015.

The TKPH rating system as given in this SAEspecification is approved by most tire manufacturers.Michelin, in addition to providing TKPH ratings hasdeveloped their own speed/load carrying rating sys-tem and we recommend that Michelin be consultedwhere high tire temperatures are a concern.

Heat generation in a specific tire at recommendedpressure depends on three factors:

● the weight the tire is carrying (flex per revolution),● the speed the tire is traveling over the ground

(flexures over a period of time), and● the air temperature surrounding the tire (ambi-

ent temperature) and road surface temperature.Once a tire manufacturer has determined a tire’s

temperature characteristics and expressed them inTKPH, the above listed specific job conditions can beused to determine any tire’s maximum work capac-ity. These conditions provide on site ability to predictand avoid costly tire separations.

21-14 Edition 41

Tires Ton-Kilometer Per Hour Rating System


Edition 41 21-15

21

TiresTon-Kilometer Per Hour Rating SystemTire Drive-Away Recommendations

Ton-Kilometer-Per-Hour Rating SystemThe tire TKPH can be matched to the site TKPH

as well as compared with TKPH values of differentmakes and types of tires.TKPH Job Rate

Average Tire Load � Average Speed for the shiftAverage Tire Load

“Empty” tire load + “loaded” tire load2

Average SpeedRound trip distance in kilometers

� number of tripsTotal Hours (in the shift)

For excessive haul length (32 kilometers or more)consult your tire representative for modification tothe TKPH value.

To use in the United States Customary System,change kilometers to miles and use short tons.

It should be noted that prolonged operation athigh casing temperatures can fatigue the nylon atthe flex points in the sidewalls.

The following are the most recent TKPH ratingsas made available by Goodyear, Michelin andBridgestone, and are subject to change on their partat any time. Other tire manufacturers’ TKPH rat-ings will be included in future handbook editionswhen and if made available. For latest TKPH rat-ings, consult specific tire manufacturer at time ofmachine and/or tire purchase.

Load-and-Carry TKPHThe wheel loader, when used in load-and-carry

applications, may encounter temperature problemssimilar to those normally associated only with tireson scrapers, trucks and wagons. Do not place thevehicle in load-and-carry applications with-out first consulting the tire manufacturer, orobtain ing maximum load and speed ratingsand pres sure recommendations from the tiremanufacturer.

Conventional and Radial Steel Cord Tire OptionsTire options now provide types to operate in con-

ditions ranging from rock and abrasive materials,to jobs with high speed hauls in good materials.

The best tire type can be different for the drive tiresthan for other tires on the same machine. TKPHshould be calculated for all tires.

TIRE DRIVE-AWAY RECOMMENDATIONSHeat separation can be a problem during machine

delivery and moving machines from one job toanother. Whenever roading earthmoving machines,check your supplier for the tire manufacturer’s rec-ommended speed limitations on the specific tiresinvolved.

Some tire manufacturers also recommend thatvehicles equipped with extra tread depth or specialcompounded tires should not be roaded without theirspecific approval. Our tests support this recommen-dation, especially for L-3, L-4, E-4 and L-5 tires.


21-16 Edition 41

Tires TKPH Rating● Goodyear Radial Ply — Conventional Sizes

TKPH RATINGSAT 38° C (100° F) AMBIENT TEMPERATURE

For Haul Lengths of 32 km (20 miles) or Less One WayMaximum Speed Not to Exceed 48 km (30 miles) per Hour

GOODYEAR RADIAL PLY CONSTRUCTION CONVENTIONAL SIZESIndustry

Code E-3

TreadDesign GP-2B GP-3D RL-2+ RL-3+ RT-3A RT-3A+

CustomCode 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S

17.5R25 TKPH 200 150 140 150 110

18.00R33 TKPH

21.00R33 TKPH

23.5R25 TKPH 260 200 170 200 150

24.00R35 TKPH 440 340 260

26.5R25 TKPH 280 230 190 230 170

27.00R49 TKPH 660 550

29.5R25 TKPH 340 270 230 270 200

29.5R29 TKPH

33.00R51 TKPH

33.25R29 TKPH 420 320

37.00R57 TKPH

40.00R57 TKPH

40.5/75R39 TKPH 580 450 350 550 420 320

46/90R57 TKPH

750/65R25 TKPH 240 180 110 230 170 110

Because of the variance between specific tires it is recommended that at the time of purchase you check with your tire supplier for the man-ufacturer’s specific TKPH ratings for the tires purchased.


Edition 41 21-17

21

TiresTKPH Rating● Goodyear Radial Ply — Conventional Sizes




Code E-4

TreadDesign GT-4B RL-4 RL-4B RL-4H RL-4J RL-4JII RM-4A+

CustomCode 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S

18.00R33 TKPH 230 175 130 230 175 130

21.00R33 TKPH 300 230 190

24.00R35 TKPH 390 300 230 390 300 230

27.00R49 TKPH 525 400 305 640 490 550 420 330 500 385 295 545 440 265 545 440 265

33.00R51 TKPH 685 525 365 755 575 395

37.00R57 TKPH 1125 860 515

40.00R57 TKPH 1260 965 570

46/90R57 TKPH 1325 1010 595



21-18 Edition 41

Tires TKPH Rating● Goodyear Radial Ply — Conventional Sizes




Code E-4 G-4 L-4 L-5 L-3

TreadDesign RT-4A RT-4A+ GP-4B-AT GP-4C RL-4K RL-5K RT-3B

CustomCode 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S 2S 4S 6S

17.5R25 TKPH 110

18.00R33 TKPH 230 180 140

23.5R25 TKPH 200 150 130 200 150 130 80 70

24.00R35 TKPH 400 300 240

26.5R25 TKPH 210 160 130

27.00R49 TKPH 600 465 360

29.5R25 TKPH 240 190 150 130 120 100 100

29.5R29 TKPH 120 110



Edition 41 21-19

21

TiresTKPH Rating● Bridgestone Radial Ply — Conventional Sizes



BRIDGESTONE RADIAL PLY CONSTRUCTION CONVENTIONAL SIZESIndustry

Code E-2 E-3

TreadDesign VKT VFT VMT VJT VLT VRL

CustomCode E1A E2A E3A E1A E2A E3A E1A E2A E3A E1A E2A E3A E1A E2A E3A E1A E2A E3A

17.5R25 TKPH 95 144

18.00R33 TKPH

21.00R33 TKPH

23.5R25 TKPH 263 205 190 190

24.00R35 TKPH

26.5R25 TKPH 293 220 220

27.00R49 TKPH 557 804

29.5R25 TKPH 376 310 266

29.5R29 TKPH 401 330

33.00R51 TKPH

33.25R29 TKPH 476 349 435 319

37.00R57 TKPH

37.25R35 TKPH 644 530 569 417 563 413

40.00R57 TKPH

40.5/75R39 TKPH 682 500 675 495

46/90R57 TKPH

750/65R25 TKPH 225

59/80R63 TKPH

NOTE: For cycle lengths of 5 km (3 miles) or less (round trip), multiply the TKPH value in this table by 1.12.Additional tread compounds are available to meet specific TKPH.



21-20 Edition 41

Tires TKPH Rating● Bridgestone Radial Ply — Conventional Sizes




Code E-4

TreadDesign VMTS VELS VMTP VRQP

CustomCode E1A E2A E3A E1A E2A E3A E1A E2A E3A E1A E2A E3A

18.00R33 TKPH 246 199 211 170 246 229 185 122

21.00R33 TKPH 293 237

24.00R35 TKPH 418 338 489 388 314

27.00R49 TKPH 492 398 361 522

40.00R57 TKPH 940 773 1117




Edition 41 21-21

21

TiresTKPH Rating● Bridgestone Radial Ply — Conventional Sizes




Code E-4

TreadDesign VRLS VLTS VSNT VRDP

CustomCode E1A E2A E3A E1A E2A E3A E1A E2A E3A E1A E2A E3A

21.00R33 TKPH 281 227

23.5R25 TKPH 161

24.00R35 TKPH 388 314 453

26.5R25 TKPH 186 165

27.00R49 TKPH 513 415 600

29.5R25 TKPH 225 220

29.5R29 TKPH 232

33.00R51 TKPH 603 496 717

37.00R57 TKPH 845 694 1009

46/90R57 TKPH 968 796 1150

750/65R25 TKPH 195

59/80R63 TKPH 1515 1228 1773




21-22 Edition 41

Tires TKPH Rating● Michelin Radial Ply — Conventional Sizes


For Haul Cycles Less than 5 km (3 miles) Round Trip

MICHELIN RADIAL PLY CONSTRUCTION CONVENTIONAL SIZESIndustry

Code E-2 E-3 E-4

TreadDesign XV XR XK XKD1 X-QUARRY S XDT X-HAUL X-HAUL S

Type C B B A A4 A B

18.00R33 TKPH 305 157 166 157 192 262 262

21.00R33 TKPH 280

24.00R35 TKPH 740 518 474 281 266 326 444 355

27.00R49 TKPH 1090 392 480 654

33.00R51 TKPH 558 682 930

NOTE: Consult Michelin for TKPH rating on haul cycles greater than 5 km (3 miles).Additional tread compounds are available to meet specific TKPH.



Edition 41 21-23

21

TiresTKPH Rating● Michelin Radial Ply — Conventional Sizes




Code E-4

TreadDesign XDR XDR S X-TRACTION RD

Type A B4 B C4 C B4 B C4 A4 B B4

27.00R49 TKPH 392 480 567 392 654 567

33.00R51 TKPH 496 620 744 837

37.00R57 TKPH 678 848 1018 1145

40.00R57 TKPH 768 960 1152 1296 1440

50/80R57 TKPH 1168 1285 1518

56/80R63 TKPH 1229 1536 1843 2150

59/80R63 TKPH 1267 1584 1901 2218 1901 2218 2535




21-24 Edition 41

Tires TKPH Rating● Michelin Radial Ply — Conventional Sizes




Code E-4

TreadDesign X-TRACTION S RD XDC XDM

Type A B B4 C C4 B4 B C4 C

27.00R49 TKPH 589 763

33.00R51 TKPH 1054 1209 1395 848 1018

40.00R57 TKPH 1056 1248 1440 1584




Edition 41 21-25

21

TiresTKPH RatingISO Load Index Speed Symbol

● Michelin Radial Ply — Wide Base Sizes



MICHELIN RADIAL PLY CONSTRUCTION WIDE BASE SIZESIndustry

Code E-3 E-4

TreadDesign XTS XMS XRS

Type B A

29.5R29 TKPH 348

33.25R29 TKPH 429

37.25R35 TKPH 540 415

40.5/75R39 TKPH 766 500

NOTE: Consult Michelin for TKPH rating on haul cycles greater than 5 km (3 miles).


ISO LOAD INDEX SPEED SYMBOLAT 38° C (100° F) AMBIENT TEMPERATURE

For Haul Cycles Greater than 5 km (3 miles) Round Trip

MICHELIN RADIAL PLY CONSTRUCTION WIDE BASE SIZESIndustry Code E-3 E-3 (DT) E-3 E-4

Tread Design XADN XADT XAD65-1 X SUPER TERRAIN

23.5R25 185B* 185B 185B

26.5R25 193B 193B 193B

29.5R25 200B* 200B 200B

650/65R25 SuperE3 180B

750/65R25 SuperE3 190B

850/65R25 SuperE3 196B

*E Speed option available via special field request.



TIRE AND RIM ASSOCIATION RATINGSWhile the TKPH Rating System provides a method

to determine the tire’s work capacity, Tire and RimAssociation Ratings provide a guide for evaluatinga tire’s structural capacity. These two rating sys-tems should be used in conjunction to evaluate tireperformance.

TIRE SELECTIONSelecting the optimum tire for a given application

is particularly critical for earthmoving. The machineshave the capability to outperform the tires and,unless proper practices are observed, very costlypremature tire failures can occur. Job conditionsvary greatly throughout the world, as well as withinany given job site, and selecting the optimum tirerequires careful consideration of all factors involved.In general, the tire manufacturer should be con-sulted before making the selection for any givenapplication. In some cases, the tire manufacturercan fabricate tires specifically tailored for a givenjob site.

For those applications where wear is extremelyslow, especially as a result of only occasional oper-ation throughout the year, the cheapest lightweighttire needs to be given strong consideration.

As job conditions become severe, the following fac-tors should be evaluated in selecting a tire:

Transport or Load-and-carry —● TKPH (primary consideration)● Minimum approved star/ply rating or greater● Largest optional size● Thickest tread commensurate with TKPH● Most cut resistant tread commensurate with

TKPH● Belted construction

Grader —● Tire load rating suitable for maximum equipped

machine weight (See Tire Load Worksheet onnext page)

● Application specific tire (snow, construction,road maintenance, mining, general purpose,all season)

● Bias or radial based on initial cost, punctureresistance, rolling resistance, life to retread/repair

Loader or Dozer —● Minimum approved ply rating or greater● Largest optional size● Thickest tread● Thickest available undertread● Buttressed shoulder● Most cut resistant tread● Belted construction● Lowest aspect ratio

All tires should be operated at the tire manufac-turer’s recommended inflation pressure for a givenapplication. Inflation pressure should be checkedevery working day with an accurate gauge. This gaugeshould be checked against a known standard suchas a dead weight tester at least once a month.

Excess loads may result from factors such as vary-ing material density, field modifications to equip-ment, mud accumulation, load transfer, etc. Onlyunder these conditions may the actual in service tireload exceed the rated machine load. When excessloads are encountered, cold inflation pressures mustbe increased to compensate for higher loads. Increasetire inflation pressure 2% for each 1% increase in load.

MaximumExcessLoad Pressure

Bias Ply 15% 30%Radial Ply 7% 14%

The above loads will result in reduced tire perfor -mance and must be approved by the tire manufacturer.

The use of chains is difficult to justify except undera few conditions. Chains are very costly and heavy,and require more maintenance than most operationscan provide. On some models sufficient clearancedoes not exist for chains with all tire combinations.Extensive modifications may be required if chainsare needed for the job.

Foam filling tires is normally not recommendeddue to high cost and lack of local filling facilities. Itsuse should be confined to loader and dozer applica-tions where penetrations occur almost daily. If foamis used be sure to adhere to recommended equivalentpressures of nitrogen and use highest available plyrating. Consult tire manufacturer for specific war-ranty concerns.

21-26 Edition 41

Tires Tire and Rim Association RatingsTire Selection


Edition 41 21-27

21

TiresTire Selection

Tire Load Worksheet (Motor Graders)Tire positions (top view)

A Machine information:

Base operating weight (kg) (1a) =

Rear operating weight (%) (2a) =

Front operating weight (%) (3a) =

B Tire loads:

Weight on rear tire before attachments (kg) (1b) = = (Tires # 1, 2, 3, 4)

Weight on front tire before attachments (kg) (2b) = = (Tires # 5, 6)

C Attachment information (reference Caterpillar Price List):

Attachment Type Tires affected Attachment weight distributionRipper 1, 2, 3, 4 25% per tirePush Block 5, 6 50% per tireFront blade (any type) 5, 6 62% per tireMid-Mount Scarifier 5, 6 40% per tire

1, 2, 3, 4 5% per tireSnow Wing 6 34% per tire

3, 4 55% per tire

Attachment #1 Attachment type: Attachment weight (kg) (1c) =

Tire positions affected (see chart) Tire #1 Tire #2 Tire #3 Tire #4 Tire #5 Tire #6

Attachment weight distribution per tire (see chart) (2c) =

Attachment weight per tire (kg) = (1c) � (2c) (3c) =









NOTE: Repeat for additional attachments if needed.

D Sum of attachment weights and Total weight per tire (kg)

Tire #1 Tire #2 Tire #3 Tire #4 Tire #5 Tire #6

(1d) = (3c) + (6c) + (9c) =

(2d) = (1d) + [(1b) or (2b)] =

E Controlling tire weight = maximum value from (2d) (1e) = kg

F Summary

– Choose a tire with a rated load capacity equal to or greater than the controlling tire weight = Tire rating > (1f)– Attachments may cause the maximum weight per tire to exceed tire capacity. In these cases the tire supplier should be consulted.– Contact your tire supplier for machine specific inflation pressures to ensure compensation for different tire loads.

(1a) � (3a) / 2

(1a) � (2a) / 4

Tire #1

Rear Tandem Front AxleForward directionof machine motion

Tire #2 Tire #5

Tire #3 Tire #4 Tire #6


TIRE SELECTION GUIDETreads

Road or Trucks and Wheel Tractors orMaterial Ground Condition Wheel Tractor-Scrapers Wheel Loaders Graders*

Silt and clay: Good varying to poor. Traction Type (E-2). Traction Type (L-2). Traction Type (G-2).– No rock. High rolling resistance.– High moisture content.

Silt and clay: Good varying to poor. Rock-type (E-3) best Rock-type (L-3, L-4, L-5) Rock-type (G-3, G-4) – Some rock. unless traction is a best unless traction is a best unless traction is – Variable moisture content. problem — then use problem — then use a problem — then use

traction tires (E-2). traction tires (L-2). traction tires (G-2). Rock-type offers more Rock-type offers more Rock-type offers more resistance to cutting. resistance to cutting. resistance to cutting.

Silty/clayey gravel/sand: Excellent to good. Rock-type (E-3, E-4) Rock-type (L-3, L-4, L-5) Rock-type (G-3, G-4, – Low moisture content. Firm surface. offers better wear. offers better wear. L-3, L-4, L-5) offers

better wear.

Silty/clayey gravel/sand: Poor, rutted, pot holes. Rock-type (E-3, E-4). Rock-type (L-3, L-4, L-5). Rock-type (G-3, G-4, – High moisture content. L-3, L-4, L-5).

Blasted rock. Hard surface, rough. Rock-type (E-4). Rock-type (L-5, L-5S). Rock-type (G-4, L-4, L-5).

Sand Good to fair surface. Rock-type (E-3) or Rock-type (L-3, L-3S) Rock-type (G-3) with – Very low silt/clay content. Flotation (E-7) if possible with low pressure. low pressure. Creates

with low pressure. Creates minimum soil minimum soil disturbance Creates minimum soil disturbance resulting resulting in improved disturbance resulting in improved flotation. flotation.in improved flotation.

*NOTE: In some cases, an L type tire is appropriate for use on a Grader application, consult your tire supplier for proper tire selection.

21-28 Edition 41

Tires Tire Selection● Guide


Edition 41 21-29

21

TiresStandard Cold Inflation Pressures● Skidders — Bias Ply

RECOMMENDED MOUNTING LUBRICANTSFROM SUPPLIERS

The following table documents tire sup plier rec-ommendations for Tire Mounting Compounds.

Tire Mounting CompoundsTire-SlickMichelin “Tigre 80” GreaseREMA TiptopFuchs SilkoleneIZY-SEEL

TIRE SUPPLIER RECOMMENDED COLDINFLATION PRESSURES

The following tables present commonly foundCaterpillar and the tire suppliers’ recommended coldinflation pressures for tires on Cat machines. Forinflation pressures of tire suppliers not listed pleaseobtain them directly from the respected supplier.

The inflation pressure is based on a ready-to-workvehicle weight, rated payload, and average operatingconditions. Pressures for each application mayneed to be varied from those shown and shouldalways be obtained from your tire supplier.

Pressures for all tires apply to rib, traction, rock,deep tread, and super deep tread tires.

NOTE: Caterpillar recommends using dry nitrogen(N2) gas for both tire inflation and pressureadjustments on all current and past pro-duction machines.

EXCAVATORSFor complete tire data and inflation pressures, see the Excavatorsection in this handbook.

STANDARD COLD INFLATION PRESSURESSKIDDERS — Bias Ply

Ply Inflation Pressure

Model Tire Size Rating Front Rear

kPa psi kPa psi525C, 30.5L-32 20 170 25 170 25535C, 30.5L-32 26 170 25 170 25545C DH35.5LB32 20 170 25 170 25

DH35.5LB32 24 170 25 170 25

Optimal pressures may vary depending on specific applicationsand working conditions. Always consult your local tire supplierfor operating pressures.


21-30 Edition 41

Tires Standard Cold Inflation Pressures● Skid Steer Loaders — Bias and Bias Belted● Telehandlers

SKID STEER LOADERS — Bias and Bias BeltedInflation Pressure

Galaxy Caterpillar Premium Caterpillar XD MichelinModel Tire Size Ply Rating Beefy Baby Conventional (Extreme Duty) XZSL

kPa psi kPa psi kPa psi kPa psi216B2 10-16.5 8, 10 for XD 345 50 410 60 345 50 310 45

226B2 10-16.5 8, 10 for XD 345 50 410 60 345 50 310 45

236B2 12-16.5 10, 14 for XD 310 45 310 45 345 50 310 45

232B2 10-16.5 8, 10 for XD 345 50 410 60 345 50 380 55

242B2 10-16.5 8, 10 for XD 345 50 410 60 345 50 380 5512-16.5 10, 14 for XD 310 45 310 45 345 50 310 45

252B2 12-16.5 10, 14 for XD 310 45 310 45 345 50 345 50

246C 12-16.5 10, 14 for XD 310 45 310 45 345 50 345 50

256C 12-16.5 10, 14 for XD 310 45 310 45 345 50 345 50

262C 12-16.5 10, 14 for XD 310 45 310 45 345 50 345 50

272C 12-16.5 10, 14 for XD 310 45 310 45 345 50 345 50

TELEHANDLERSModel Tire Size Ply Rating Inflation Pressure

kPa psiTL642 13.00 x 24 12 448 65

TL943 13.00 x 24 12 448 65

TL1055 14.00 x 24 12 448 65

TL1255 14.00 x 24 12 448 65

TH255 12.00 x 16.5 12 551 8014.00 x 17.5 10 482 70

TH406 15.5/80 – 24 16400/80R24460/70R2415.5 – 25

15.5/80 – 24 16

TH407 15.5/80 – 24 16 See machine OMM for operating pressures.400/80R24440/80R24460/70R24500/70R2415.5 – 25

15.5/80 – 24 16

Optimal pressures may vary depending on specific applications and working conditions. Always consult your local tire supplier for operatingpressures.


BACKHOE LOADERS (Front)Ply/Speed Inflation

Model Tire Size Symbol Pressure

kPa psi416E, 420E, 422E 11Lx16 (F3) 12 441 64

416E, 420E, 422E, 428E, 430E, 432E, 442E 12.5/80-18 (1-3) 12 372 54

416E, 420E, 422E, 428E, 430E, 432E, 442E, 442E AWS 340/80R18 142 A8 400 58

450E 15-19.5 12 414 60

428E, 432E, 442E 340/80R20 144 A8 317 46

434E 440/80R24 154 A8 317 46

434E, 444E 440/80R28 156 A8 317 46

434E, 444E 440/80-28 12 317 46

BACKHOE LOADERS (Rear)Ply/Speed Inflation

Model Tire Size Symbol Pressure

kPa psi416E 16.9-24 (R-4) 10 221 32

416E, 420E, 430E 19.5L-24 (R-4) 12 234 34

422E, 428E, 432E 16.9-28 (R-4) 12 262 38

428E, 432E, 442E 18.4-26 (R-4) 12 248 36

434E 440/80R24 154 A8 317 46

422E, 428E, 432E, 442E, 442E AWS, 434E, 444E 440/80R28 156 A8 317 46

428E, 432E, 442E, 442E AWS, 434E, 444E 440/80-28 (R-4) 12 317 46

428E, 432E, 442E 480/80-26 (R-4) 160 A8 317 46

416E, 420E, 430E, 450E 21L-24 (R-4) 16/18 276/310 40/45

416E, 420E, 430E 500/70R24 157 A8 400 58

Edition 41 21-31

21

TiresStandard Cold Inflation Pressures● Backhoe Loaders (Front/Rear)



21-32 Edition 41

Tires Standard Cold Inflation Pressures● Paving Products — Bias Ply and Radial Pneumatic Tires

PAVING PRODUCTS — Bias Ply and Radial Pneumatic TiresModel Tire Size Ply/Strength Rating Inflation Pressure1, 2, 3

kPa psiCS323C 11.2 – 24 6 180 26

11.2 – 24 8 250 36

CP323C 11.2 – 24 8 250 36

CS423E 14.9 – 24 6 140 2014.9 – 24 8 180 26

CS433E 14.9 – 24 6 140 2014.9 – 24 8 180 26

CP433E 14.9 – 24 8 180 26

CS54 23.1 – 26 8 110 16

CS56 23.1 – 26 8 110 16

CP56 23.1 – 26 8 110 16

CS64 23.1 – 26 8 110 1623.1 – 26 12 110 16

CP64 23.1 – 26 12 110 16

CS74 23.1 – 26 8 110 1623.1 – 26 12 110 16

CS76 23.1 – 26 12 110 16

CP76 23.1 – 26 12 110 16

AP500E 17.5R25 � 450 65

AP600D 16.00 – 24 12 350 50445/95R25 �� 550 80

AP1000D 18.00 – 25 16 350 50445/95R25 �� 550 80

1Inflation pressures are maximum rated tire pressures.2Pressure varies with application for Pneumatic Tire Compactors (PS).3Consult your local tire supplier for operating pressures.



Edition 41 21-33

21

TiresStandard Cold Inflation Pressures● Motor Graders — Bias Ply

MOTOR GRADERS — Bias Ply*Inflation Pressure

Ply Goodyear Bridgestone/Firestone Triangle

Model Tire Size Rating Front Rear Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi120M 13.00-24 12 240 35 345 50

14.00-24 12 210 30 275 4016 175 25 250 36 210 30 275 40

17.5-25 12 175 25 200 29 210 30 275 4016 175 25 250 36 210 30 275 40

120K 13.00-24 10 240 35 240 3512 225 33 225 33 240 35 240 35

14.00-24 10 225 33 225 3312 175 25 175 25 250 36 250 3616 175 25 175 25 250 36 250 36

17.5-25 12 250 36 250 36 200 29 200 29

12M 13.00-24 12 210 30 275 4016 210 30 275 40

14.00-24 12 175 25 250 36 210 30 275 4016 200 29 300 44 210 30 275 40

17.5-25 12 175 25 225 33 210 30 240 3516 200 29 300 44 210 30 240 35

12K 13.00-24 12 275 40 275 4012 200 29 200 29 250 36 250 3616 200 29 200 29 350 51 350 51

17.5-25 12 250 36 250 36 325 47 325 47

140M 14.00-24 12 175 25 275 40 210 30 275 4016 225 33 350 51 210 30 275 40

17.5-25 12 210 30 275 4016 175 25 250 36 210 30 275 40

140K 14.00-24 12 175 25 175 25 250 36 250 3616 175 25 175 25 350 51 350 51

17.5-25 12 250 36 250 3620 325 47 325 47

14M 16.00-24 16 200 29 300 44 175 25 310 45

160M 14.00-24 12 210 30 275 4016 250 36 375 54 210 30 275 40

17.5-25 12 200 29 200 29 250 36 250 3616 200 29 200 29

160K 14.00-24 12 250 36 250 3616 350 51 350 51

17.5-25 12 250 36 250 3620 325 47 325 47

*Refer to Tire Load Worksheet to determine proper ply rating.



21-34 Edition 41

Tires Standard Cold Inflation Pressures● Motor Graders — Radial Ply

MOTOR GRADERS — Radial PlyInflation Pressure

Strength Michelin Goodyear Bridgestone

Model Tire Size Rating Front Rear Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi120M 14.00R24 � 240 35 275 40 275 40 325 47 240 35 310 45

17.5R25 � 210 30 240 35 225 33 275 40 210 30 240 35

120K 14.00R24 � 210 30 210 30 240 35 310 45

12M 14.00R24 � 210 30 310 45 250 36 375 54 240 35 310 4517.5R25 � 210 30 240 35 225 33 300 44 210 30 275 40

12K 14.00R24 � 210 30 240 35 240 35 310 45

140M 14.00R24 � 210 30 310 45 275 40 375 54 240 35 310 4517.5R25 � 240 35 310 45 225 33 300 44 210 30 240 35

140K 14.00R24 � 210 30 240 35 240 35 310 45

14M 16.00R24 � 240 35 350 50 275 40 375 54 240 35 380 5520.5R25 � 210 30 275 40 200 29 300 44 210 30 210 45

160M 14.00R24 � 210 30 310 45 300 44 425 62 240 35 310 4517.5R25 � 240 35 310 45 225 33 350 51 210 30 240 35

160K 14.00R24 � 210 30 240 35 240 35 310 45

16M 23.5R25 �, �� 210 30 275 40 200 29 325 47 210 30 310 45

24M 29.5R25 �, �� 310 45 380 55 350 51 450 65 310 45 380 55



Edition 41 21-35

21

TiresStandard Cold Inflation Pressures● Wheel Tractor-Scrapers — Bias and Radial Ply

WHEEL TRACTOR-SCRAPERS — Bias PlyInflation Pressure

Goodyear Bridgestone/Firestone

Model Tire Size Ply Rating Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi613G 23.5-25 16, 20 324 47 324 47 300 44 300 44

621G 29.5-29 28, 34 427 62 427 6233.25-29 26, 32 400 58 276 40 379 55 379 55

623G 33.25-29 26, 32 400 58 372 54 379 55 379 55

627G 33.25-29 26, 32 400 58 400 58 379 55 379 55

631G 37.25-35 36, 42 427 62 372 54 448 65 448 65

637G 37.25-35 36 448 65 427 62

WHEEL TRACTOR-SCRAPERS — Radial PlyInflation Pressure


Model Tire Size Index Front Rear Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi613G 23.5R25 �, �� 379 55 345 50 372 54 372 54 379 55 379 55

621G 29.5R29 �� 483 70 414 60 572 83 572 83 517 75 517 7533.25R29 �� 448 65 379 55 448 65 352 51 448 65 448 65

623G 29.5R29 �� 517 75 517 7533.25R29 �� 483 70 414 60 448 65 427 62 448 65 448 65

627G 29.5R29 �� 517 75 517 7533.25R29 �� 517 75 448 65 448 65 448 65 448 65 448 65

631G 37.25R35 �� 552 80 483 70 476 69 427 62 552 80 552 80

637G 37.25R35 �� 552 80 483 70 524 76 476 69 552 80 552 80

657G 40.5/75R39 �� 586 85 517 75 600 87 600 87 621 90 621 90



21-36 Edition 41

Tires Standard Cold Inflation Pressures● Articulated Trucks — Radial Ply● Construction and Mining Trucks and Tractors — Radial Ply

ARTICULATED TRUCKS — Radial PlyInflation Pressure

Ply Michelin Goodyear Bridgestone

Model Tire Size Rating Front Center Rear Front Center Rear Front Center Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi725 23.5R25 �� 345 50 379 55 379 55 372 54 372 54 372 54 379 55 379 55 379 55

750/65R25 �� 276 40 310 45 310 45 310 45 310 45 310 45

730 23.5R25 �� 414 60 448 65 448 65 372 54 448 65 448 65 414 60 483 70 483 70750/65R25 �� 310 45 345 50 345 50 303 44 352 51 352 51 345 50 379 55 379 55

730 EJ 750/65R25 �� 345 50 379 55 379 55 276 40 400 58 400 58 310 45 414 60 414 60

735 26.5R25 �� 448 65 448 65 448 65 448 65 400 58 400 58 483 70 448 65 448 65850/65R25 �� 345 50 345 50 345 50

740 29.5R25 �� 379 55 414 60 414 60 372 54 372 54 372 54 448 65 414 60 414 60850/65R25 �� 379 55 414 60 414 60

740 EJ 29.5R25 �� 379 55 448 65 448 65 324 47 427 65 427 62 379 55 483 70 483 70

CONSTRUCTION AND MINING TRUCKS — Radial PlyInflation Pressure



kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi770 18.00R33 ��, �� 750 109 750 109 772 112 800 116 800 116 800 116

772 21.00R33 �� 655 95 655 95 700 102 700 102 690 100 690 100

773F 24.00R35 �� 725 105 725 105 675 98 600 87 690 100 690 100

775F 24.00R35 �� 725 105 725 105 720 104 720 104 690 100 690 100

777F 27.00R49 �� 725 105 725 105 700 102 730 106 690 100 690 100

785C 33.00R51 �� 725 105 725 105 800 116 800 116 725 105 725 105

785D 33.00R51 �� 725 105 725 105 800 116 800 116 725 105 725 105

789C 37.00R57 �� 655 95 655 95 750 109 750 109 725 105 725 105

793D 40.00R57 �� 725 105 725 105 750 109 750 109 725 105 725 10546/90R57 �� 750 109 750 109 690 100 690 100

793F 40.00R57 �� 725 105 725 105 800 116 780 11346/90R57 �� 750 109 710 103 690 100 690 10050/80R57 �� 620 90 620 90

795F 56/80R63 �� 655 95 620 9059/80R63 �� 700 102 700 102

797F 59/80R63 �� 690 100 690 100 690 100 690 100



Edition 41 21-37

21

TiresStandard Cold Inflation Pressures● Wheel Loaders — Bias and Bias Belted

WHEEL LOADERS — Bias and Bias BeltedInflation Pressure1

Strength Goodyear Bridgestone/Firestone

Model Tire Size Index Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi904H 12-16.5 10 240 35 175 25

33-15.5x16.5 12

914G 15.5-25 12 240 35 210 3017.5-25 12 400 58 300 44 240 35 210 30

924H 17.5-25 12 400 51 300 36 380 55 275 4020.5-25 12 250 36 210 30 275 40 30

924Hz 17.5-25 12 400 58 300 44 380 55 275 4020.5-25 12 400 58 300 44 275 40 210 30

928Hz 17.5-25 12 400 58 300 44 380 55 275 4020.5-25 12 400 58 300 44 275 40 210 3023.1-26 14

930H 17.5-25 12 400 58 300 44 380 55 275 4020.5-25 12 400 58 300 44 275 40 210 3023.1-26 14

938H 20.5-25 16, 20 350 51 250 36 310 45 210 30

950H 23.5-25 16, 20 375 54 250 36 345 50 210 30

950K 23.5-25 16, 20 345 50 345 50

962H 23.5-25 16, 20 400 58 250 36 380 55 240 35

962K 23.5-25 16, 20 380 55 240 35

966H 26.5-25 20, 26 375 54 225 33 415 60 275 40

966K 26.5-25 20, 26 450 65 300 44 415 60 275 40

972H 26.5-25 20, 26 400 58 225 33 450 65 275 40

972K 26.5-25 20, 26 450 65 300 44 450 65 275 40

980H 29.5-25 28 430 62 275 40 585 85 380 55

980K 29.5-25 28 550 80 380 55

988H 35/65-33 42 360 91 430 62 655 95 415 60

990H 41.25/70-39 42 550 80 350 51 585 85 415 60

992K 45/65-45 58 625 91 425 62 725 105 485 70

993K 50/65-51 62 725 105 485 70

994F 49.5/85-57 76 725 105 485 7050/80-57 68 725 105 485 7052/80-57 68 600 87 400 5853.5/85-57 76 725 105 485 7058/85-57 84 725 105 485 70

1For pressures not listed, consult your local tire supplier for operating pressures.



21-38 Edition 41

Tires Standard Cold Inflation Pressures● Log Loaders — Bias and Bias Belted● Integrated Toolcarriers — Bias and Bias Belted

LOG LOADERS — Bias and Bias BeltedInflation Pressure



kPa psi kPa psi kPa psi kPa psiIT14G 15.5-25 12

17.5-25 12

924H Versalink 17.5-25 12 352 51 248 36 Consult Bridgestone/Firestone20.5-25 12

930H Versalink 20.5-25 12

938H 20.5-25 16, 20 400 58 276 40 310 45 207 30

950H 23.5-25 20 372 54 276 40 345 50 207 30

966H 26.5-25 20, 26 448 65 276 40 414 60 276 40

980H 29.5-25 28 427 62 276 40 586 85 379 55

988H 35/65-33 42 655 95 414 60

NOTE: Contact your tire supplier to obtain or confirm proper Log Loader pressures.

INTEGRATED TOOLCARRIERS — Bias and Bias BeltedInflation Pressure



kPa psi kPa psi kPa psi kPa psiIT14G 15.5-25 310 45 207 30

17.5-25 276 40 172 25

924H Versalink 17.5-25 310 45 241 35 Consult Bridgestone/Firestone20.5-25 276 40 207 30

930H Versalink 20.5-25 276 40 207 30

IT38H 20.5-25 400 58 276 40 379 55 276 40

IT62H 23.5-25 372 54 248 36 345 50 207 30

NOTE: Contact your tire supplier to obtain or confirm pressures.



WHEEL LOADERS — Radial PlyInflation Pressure



kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi906H 405/70R18 �

335/80R18 � 310 45 210 30340/80R18 � 275 40 210 30

908H 375/75R20 � 275 40 210 30

914G 17.5R25 � 240 35 210 30 415 60 275 40

924H 17.5R25 � 275 40 210 30 415 60 310 45550/65R25 �20.5R25 � 275 40 210 30 325 47 230 33 415 60 275 40

924Hz 17.5R25 � 415 60 310 4520.5R25 � 275 40 210 30 415 60 275 40

928Hz 17.5R25 � 345 50 210 3020.5R25 � 275 40 210 30 415 60 310 45600/65R25 � 275 40 210 30

930H 17.5R25 � 345 50 210 3020.5R25 � 275 40 210 30 415 60 310 45600/65R25 � 275 40 210 30

938H 20.5R25 � 345 50 210 30 450 65 305 44 310 45 210 30550/65R25 � 380 55 240 35650/65R25 � 275 40 210 30 40 175 25

950H 23.5R25 �, �� 310 45 210 30 450 65 305 44 345 50 210 30650/65R25 � 380 55 210 30750/65R25 � 345 50 210 30 310 45 175 25

950K 23.5R25 �, �� 415 60 240 35 475 69 305 44 345 50 210 30750/65R25 � 345 50 210 30

962H 23.5R25 �, �� 345 50 210 30 475 69 305 44 380 55 240 35

962K 23.5R25 �, �� 450 65 275 40 475 69 305 44 380 55 240 35750/65R25 � 345 50 210 30

966H 26.5R25 �, �� 415 60 240 35 450 65 275 40 405 60 275 40750/65R25 � 380 55 240 35

966K 26.5R25 �, �� 415 60 240 35 475 69 275 44 405 60 275 40

972H 26.5R25 �, �� 450 65 240 35 475 69 305 44 450 65 275 40750/65R25 � 380 55 240 35

972K 26.5R25 �, �� 450 65 275 40 475 69 305 44 450 65 275 40

980H 29.5R25 �, �� 520 75 275 40 475 69 305 44 585 85 380 55

980K 29.5R25 �, �� 520 75 275 40 525 76 300 47 550 80 380 55

988H 35/65R33 �, �� 585 85 415 60 630 91 427 62 795 115 525 76

990H 45/65R39 � 585 85 345 50 550 80 350 51 620 90 485 70

992K 45/65R45 � 620 90 415 6045/65R45 �� 655 95 505 73 725 105 485 70

993K 50/65R51 �� 620 90 415 60 725 105 485 70

994F 55/80R57 � 700 102 585 8555.5/80R57 �� 725 105 485 7060/80R57 � 700 102 585 85

NOTE: Bridgestone/Firestone inflation pressure for Giant Loader Tires (992K and above) are in reference to applications without chains. For use with chains please con-sult your Bridgestone/Firestone representative.


Edition 41 21-39

21

TiresStandard Cold Inflation Pressures● Wheel Loaders — Radial Ply


21-40 Edition 41

Tires Standard Cold Inflation Pressures● Log Loaders — Radial Ply● Integrated Toolcarriers — Radial Ply

LOG LOADERS — Radial PlyInflation Pressure



kPa psi kPa psi kPa psi kPa psi kPa psi kPa psiIT14G 15.5R25 � 414 60 276 40 345 50 276 40

17.5R25 � 345 50 207 30 414 60 310 45 345 50 276 40

924H 17.5R25 � 414 60 207 30 427 62 276 40 345 50 276 4020.5R25 � 310 45 207 30 324 47 228 33 345 50 276 40550/65R25 � 310 45 207 30 324 47 228 33 414 60 310 45

930H 20.5R25 � 379 55 207 30 414 60 310 45 345 50 276 40650/65R25 � 310 45 207 30 414 60 310 45

938H 20.5R25 � 414 60 276 40 448 65 303 44 310 45 207 30550/65R25 � 414 60 241 35600/65R25 �650/65R25 � 345 50 207 30

950H 23.5R25 �, �� 414 60 276 40 476 69 303 44 345 50 207 30650/65R25 � 345 50 241 35750/65R25 � 276 40 207 30

966H 26.5R25 �, �� 414 60 276 40 448 65 303 44 414 60 276 40750/65R25 � 414 60 276 40

980H 29.5R25 �, �� 517 75 276 40 503 73 303 44 586 85 379 55

988H 35/65R33 �, �� 621 90 414 60 800 116 600 87 655 95 414 60

NOTE: Contact your tire supplier to obtain or confirm proper Log Loader pressures.

INTEGRATED TOOLCARRIERS — Radial PlyInflation Pressure



kPa psi kPa psi kPa psi kPa psi kPa psi kPa psiIT14G 15.5R25 � 276 40 207 30 345 50 276 40

17.5R25 � 241 35 207 30 414 60 310 45 207 30 310 45

924H 17.5R25 � 345 50 207 30 414 60 310 45 345 50 276 4020.5R25 � 310 45 207 30 414 60 310 45 345 50 276 40550/65R25 � 276 40 207 30 414 60 310 45

930H 17.5R25 � 345 50 207 30 414 60 310 45 345 50 276 4020.5R25 � 276 40 207 30 414 60 310 45 345 50 276 40550/65R25 � 414 60 310 45600/65R25 � 310 45 207 30

IT38H 20.5R25 � 276 40 207 30 427 62 276 40 448 65 241 45

IT62H 23.5R25 � 276 40 207 30 427 62 276 40 345 50 207 30

NOTE: Contact your tire supplier to obtain or confirm pressures.



WHEEL DOZERS — Bias PlyInflation Pressure

Ply Rating or Goodyear Bridgestone/Firestone

Model Tire Size Strength Index Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi814F2 23.5-25 12, 20 248 36 228 33

824H 29.5-25 22, 28 248 36 248 36 276 40 276 40

834H 35/65-33 24, 30, 42 324 47 324 47 345 50 345 50

844H 41.25/70-39 34, 42 303 44 303 44 414 60 414 60

854K 45/65-45 58 425 62 275 40 517 75 448 65

WHEEL DOZERS — Radial PlyInflation Pressure

Ply Rating or Michelin Goodyear Bridgestone

Model Tire Size Strength Index Front Rear Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psi814F2 23.5R25 � 310 45 310 45

26.5R25 � 276 40 276 40

824H 29.5R25 �, �� 276 40 276 40 303 44 303 44 345 50 345 50

834H 35/65R33 � 379 50 379 50 400 58 400 58 345 50 345 50875/65R33 �� 400 58 400 58

844H 45/65R39 � 379 55 345 50 400 58 400 58 414 60 414 60

854K 45/65R45 � 483 60 483 60 427 62 427 62 483 70 414 6045/65R45 �� 427 62 427 62


Edition 41 21-41

21

TiresStandard Cold Inflation Pressures● Wheel Dozers — Bias and Radial Ply


21-42 Edition 41

Tires Standard Cold Inflation Pressures● Underground Mining — Bias and Radial Ply

UNDERGROUND MINING — Bias and Radial PlyLOAD – HAUL – DUMP Inflation Pressure

Ply Rating or Bridgestone Michelin Goodyear

Model Tire Size Strength Index Front Rear Front Rear Front Rear

kPa psi kPa psi kPa psi kPa psi kPa psi kPa psiR1300G 17.5xR25, VSMS L5S, BR �� 650 94 480 70

17.5x25 , VSDL, BR �� 650 94 480 7017.5xR25, XMINE D2 MICH �� 691 100 622 9017.5x25 20 PLY SMO GY 20 552 80 448 65

R1600G 18xR25, VSMS L5S BR �� 650 94 450 6518xR25 XMINE D2 L5 MICH �� 691 100 518 7518x25, SMO L5S, GY 28 552 80 448 65

R1700G 26.5xR25, VSMS L5S, BR �� 650 94 450 6526.5x25, VSDL, BR �� 650 94 450 6526.5xR25, XMINE, D2, MICH �� 622 90 415 6026.5x25, 32 PLY, GY 32 552 80 448 65

R2900G 29.5x29, 2* VSMS, BR �� 650 94 450 6529.5xR29, VSDL L5 BR �� 650 94 450 6529.5xR29, XMINE, D2, MICH 622 90 415 6029.5x29, 40 PLY SMO GY 40 690 100 552 8029.5x29 34 PLY, SMO GY 34 690 100 552 80

R2900G XTRA 35/65 R33, VSNT, BR �� 650 94 450 6535/65 R33, VSDL, BR �� 650 94 450 65

ARTICULATED TRUCKS

AD30 26.5x25, VSNT, BR �� 650 94 650 9426.5x25, VSDL, BR �� 650 94 650 9426.5xR25, XLDD1A, MICH � 415 60 553 8026.5xR25, GP-4D, E4, GY �� 517 75 448 65

AD45B 29.5xR29, VSNT, BR �� 650 94 650 9429.5xR29, VSDL, L5, BR �� 650 94 650 9429.5xR29, XLDD 2A, MICH �� 449 65 518 7529.5xR29, 2*, RL-5K, GY �� 517 75 517 75

AD55B 35/65 R33, VSNT, BR �� 650 94 650 9435/65 R33, VSDL, BR �� 650 94 650 9435/65 R33, XLDD 2A, MICH � 656 95 656 9535/65 R33, XLDD 1A, MICH � 656 95 656 95



Liquid Ballasting Table● 75% Fillage

Edition 41 21-43

21

Tires

BIAS PLY TIRES RADIAL PLY TIRESWeight Mixing Proportions Weight Mixing Proportions

Increase IncreaseTire Size Per Tire CaCl Water Per Tire CaCl Water

kg lb kg lb L gal kg lb kg lb L gal13.00-24TG 188 414 55 122 132 35 185 407 57 125 128 3414.00-24TG 215 475 63 140 151 40 256 565 79 173 179 4715.5-25 192 423 56 125 136 36 224 493 69 151 155 4116.00-24TG 333 735 98 217 234 62 355 783 109 240 246 6517.5-25 262 577 77 170 185 49 311 686 95 210 216 5718.00-25 454 1002 134 296 322 85 502 1107 154 340 348 9218.4-34 417 919 123 272 295 78 — — — — — —20.5-25 405 892 119 263 284 75 448 987 137 303 310 8223.1-26 522 1151 154 340 367 97 — — — — — —23.5-25 585 1291 173 382 412 109 633 1396 194 428 439 11624.5-32 703 1549 207 458 496 131 — — — — — —26.5-25 758 1671 224 494 533 141 841 1853 258 568 583 15426.5-29 752 1658 222 490 530 140 928 2045 284 627 644 17028L-26 709 1563 209 462 500 132 — — — — — —29.5-25 970 2139 286 632 685 181 1073 2368 328 723 745 19729.5-29 1050 2315 310 684 738 195 1190 2623 365 804 825 21829.5-35 1159 2556 344 758 821 217 1286 2835 394 869 892 23630.5L-32 874 1928 258 570 617 163 — — — — — —33.25-35 1485 3275 439 968 1048 277 1592 3508 487 1074 1105 29237.25-35 1712 3775 505 1115 1211 320 2128 4692 653 1439 1476 39038-39 1870 4123 552 1218 1317 348 — — — — — —35/65-33 1339 2953 396 873 942 249 1430 3152 438 967 992 26240/65-39 2077 4580 614 1353 1465 387 2194 4836 673 1483 1522 40241.25/70-39 1897 4183 561 1236 1336 353 — — — — — —45/65-45 2548 5617 753 1659 1794 474 — — — — — —

NOTE: Ballast weight for bias ply tires from Goodyear data, radial ply weights from Michelin data. Contact your tire supplier for additional information. Under abnormal tirewear conditions, ballasting of rear tires may be desirable. Ballasting of front tires also should only be done where extremely rapid tire wear rates are encountered.Excessive weight will reduce machine performance.

NOTE: Fillage beyond 75% of tire enclosed volume is not recommended. With liquid ballasting, inflation pressure must be checked at least once per day.

NOTE: 1.6 kg (31⁄2 lb) Calcium Chloride per gallon water. Solution weighs 4.6 kg (10.15 lb) per gallon.

NOTE: Total machine mass including all attachments in operating condition, all reservoirs at full capacity and ballasted tires must not exceed certification mass listed onthe ROPS certification label.

NOTE: Special air to water valves are required for liquid filled tires.


21-44 Edition 41

Notes —


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