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Benchmark Tire
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Make & Description ......................
SMITHERS RAPRA, INC.TIRE SPECIFICATION NO. 1538-IT
CONTINENTAL MABORPORTO
PORTUGAL
Size of Tire ..................................
No. of Plies/Load Range ...Tire Weight ............................................Rim and Inflation ..........................Cross Section (Inflated), In. .................................Overall Diameter (Inflated), In. .............................Outside Perimeter -Heel to Heel, In. ....................Inside Perimeter -Toe to Toe, In. ..........................
Serial Number .........................
Toe to Heel, In. ...................................................
225/45R17 91YCONTINENTAL
ContiSportContact 5DOT AF7R P3X03612
1RA+2W+1PA / 20.10 Lbs.
17.00x7.50 26 PSI8.81
25.0915.3014.70
0.59 Inside Bead Diam., In. - Heel .............................Inside Bead Circ., In. -Heel ................................Material Volume, Cu. In. ....................................Air Volume, Cu. In. .......................................Cushion, In. ......................................................Shoulder Tread Rubber Thickness, In. ...............Total Shoulder Thickness, In. .............................Total Crown Thickness, In. .................................Tread Thickness, In. ..........................................
Tread Arc Width (Inflated), In. .............................Tread Radius (Inflated), In. ................Non-Skid Depth, In. (Max.) .................................
Size Factor, In. .................................................
48.00/15.507.140.310.340.540.450.240.001768427
54.4417.3333.90Liner Gauge (Center) In. .................................... 0.034
Liner Gauge (Minimum) at Shoulder In. ................. 0.032
CARCASS CORD DATA (Rayon) Ply 1Cord Construction ................................ (1650)/2Cord Tensile-Conditioned, Lb. ............. 29.2Cord Tensile-Bone Dry, Lb. ................. 30.8LASE @ 3% Conditioned, Lb. .............. 16.8LASE @ 3% Bone Dry, Lb. ................. 24.6Elong. @ Break-Conditioned, % ......... 13.6Elong. @ Break-Bone Dry, % .............. 9.9Cable Twist, Turns per Inch ................. 11.0Direction of Twist ................................. z/sCord Gauge, In. ................................... 0.028Cords/Inch-Crown-Normal ................... 19.5Cords/Inch-Crown-Circum. .................. 19.5Cord Angle-Crown, Deg. ..................... 90.0Picks per Inch ..................................... 1.8Ply Lay ............................................... ----Ply Gauge @ Crown: Bottom of Ply 1 to Top of Ply 1 ........ 0.024 In.
Total Carcass Strength/Inch-Normal ..... 601 Lb. : Cond. 569 Lb. 7122 Lb. : Cond. 6936 Lb.Total Carcass Strength/Inch-Circum. .... 601 Lb. : Cond. 569 Lb. 2764 Lb. : Cond. 2732 Lb.
Including Belts
December 15, 2014Copyright 2014 by Smithers Rapra, Inc.All rights reserved.
BELT DATA Position 1 Position 2 Position 3Material ................................ Wire Wire Aramid/NylonCordWire/Cord Construction ........ 1x2x0.30mm 1x2x0.30mm (1500)/1+(1260)/1 Lay ................................ 0.67 Left 0.67 Left ----Tensile, Lb. ............................. 104 103 ----O.D. mm. (without wrap) ........ 0.60 0.60 ----Total Wires ............................. 2 2 ----Cord Tensile -Conditioned, Lb. ---- ---- 66.9Cord Tensile -Bone Dry, Lb. ... ---- ---- 75.0Cord Twist, Turns per Inch ..... ---- ---- 7.0Direction of Twist .................... ---- ---- z/sCord Gauge, In. ...................... ---- ---- 0.028Cords/Inch-Crown-Normal ...... 24.5 24.5 19.0Cords/Inch-Crown-Circum. ..... 10.4 10.4 ----Cord Angle-Crown, Deg. ........ 25.0 25.0 ----Belt Lay .................................. Right Left CircumBelt Width, In. ......................... 7.75 7.19 8.41
FLIPPER None
Belt 3 is made up of a continuously-wound hybrid cord (1500/1 Aramid)+(1260/1 Nylon) with built-up shoulders.
CHAFER Position 1 Position 2Material .......................................... NylonCord RubberCord Gauge, In. ............................. 0.021 ----Cords/Inch (Count) ........................ 10 ----Cord Angle-Crown, Deg. ................. 30.0 ----Width, In. ..................................... 1.60 3.20
6 turns 5 strands of 0.035 in. diameter wire. Hard rubber filler stock. No fabric cover. Tensile - 292 Lb. BEAD
December 15, 2014Copyright 2014 by Smithers Rapra, Inc.All rights reserved.
Sheet #2Spec. No. 1538-IT
ADHESIONS AVG. MAX. AVG. MAX.Sidewall & Carcass, PPI 40 71 24 36Carcass & Belt 1, PPI 26 31 18 20Belt 1 & Belt 2, PPI 22 29 20 26Belt 3 & Tread, PPI 58 79 36 54
ROOM TEMPERATURE 100 Deg. C.
PHYSICAL PROPERTIES TreadBlack
Sidewall LinerHardness ........................................ 68 51 53Stress @ 100% Elong., PSI ............. 601 297 244Stress @ 200% Elong., PSI ............. 1356 670 406Stress @ 300% Elong., PSI ............. 2303 1167 578Stress @ 400% Elong., PSI ............. ---- 1612 730Stress @ 500% Elong., PSI ............. ---- ---- ----Stress @ Break, PSI ....................... 2554 1645 808Elongation @ Break, % ................... 328 419 465
Subtread Bead Filler Chafer #2Hardness ........................................ 70 90 71
CHEMICAL ANALYSIS TreadBlack
Sidewall LinerBelt
Compound Subtread Bead FillerSpecific Gravity ............................... 1.253 1.053 1.269 1.171 1.149 1.194Plasticizer, % .................................. 10.53 8.00 7.07 8.47 11.13 9.85Ash, % ........................................... 39.08 2.26 23.05 5.43 11.65 3.27Insol in HCl, % ................................ 37.18 0.16 0.28 1.10 9.47 0.10Carbon Black, % ............................. 2.84 21.64 28.85 35.62 24.41 35.98Total Sulfur, % ................................ 1.16 2.16 0.62 2.66 2.34 2.64Zinc Oxide, % ................................. 0.80 1.47 1.39 3.72 1.55 2.89Calcium Carbonate, % .................... 0.26 0.24 19.76 0.22 0.09 0.09Titanium Dioxide, % ........................ ---- ---- ---- ---- ---- ----Silicon Dioxide, % ........................... 35.82 ---- ---- ---- 9.04 ----Rubber Polymer By Weight, % ....... 48.10 68.43 45.11 50.62 53.32 51.53Insol in H2SO4, % .......................... ---- ---- ---- ---- ---- ----Magnesium Oxide, % ..................... ---- ---- 0.10 ---- ---- ----Cobalt, % ........................................ ---- ---- ---- 0.16 ---- ----Polymer, % ...................................... 20NR
80SBR30NR70BR
NRSBRBIIR
100NR 60NR40BR
60NR20SBR20BR
Belt WedgeShoulder Buttress Chafer #2
Tread Chimney
Sp. Gravity... 1.178 1.068 1.172 ---
VISCOELASTIC TREAD RUBBER PROPERTIES(Temperature -30 to 60, Strain Amplitude 0.25%, Frequency 10Hz, Ramp Rate 4C/min.)
TemperatureE' ElasticModulus
E'' ViscousModulus
Tan dTangent Delta
E* ComplexModulus
D'' LossCompliance
(C) (MPa) (MPa) -- (MPa) (MPa-1)-25 521.10 182.40 0.35 552.10 0.00060 40.35 18.53 0.46 44.40 0.0094
25 23.98 5.91 0.25 24.69 0.009760 16.14 2.81 0.17 16.38 0.0105
Tg(C): -14.30 Peak Tan Delta
December 15, 2014Copyright 2014 by Smithers Rapra, Inc.All rights reserved.
Sheet #3Spec. No. 1538-IT
REMARKS: Tread is superimposed on subtread. Liner stock extends from toe on serial side to 0.05 in. above toe on non-serial side and is approx. 0.034 in. in thickness at crown. Liner splice is on an approx. 81 degree angle. Each sidewall has a thin rubber strip located between the liner and the ply which extends down from the shoulder area and is approx. 2.40 in. in length. Venting: Inside of tire has angular vents spaced approx. 0.20 in. apart at bead. Vents are approx. 5.70 in. long on serial side and 5.20 in. long on non-serial side, approx. 0.07 in. wide and approx. 0.02 in. raised and are part of a molded vent pattern (see section). Tread mold is divided into 9 radial segments. Treadwear indicators are marked with 6 TWI around the shoulder of the tire.
PITCH SEQUENCE MEASUREMENTID: 1 2 3 4 5 6 7 8Measurement (P1): 3.15 3.50 3.65 3.80 3.95 4.10 4.25 4.40Measurement (P2): 1.10 1.30 1.55Measurement (P1):Total of 21 pitches (See tread footprint for point measurement)/ = Radial Segment/2/83/4/12/33/424/15/632/445/37Measurement (P2):Total of 60 pitches (See tread footprint for point measurement)/ = Radial Segment/1233/332232/122112/3332112/321111111/1111123/3333321/22112222/233321
Load on Tire, Lb. ................................ 1153 @ 30 PSI 1153 @ 35 PSITotal Footprint Area, Sq. In. ............... 33.34 33.32Net Contact Area, Sq. In. .................... 20.52 20.54Loaded Radius, In. ............................. 11.62 11.71Tread Width from Footprint, In. ........... 7.06 6.91Loaded Deflection, In. ......................... 0.93 0.84Loaded Section Width, In. .................. 9.31 9.24
TIRE FOOTPRINT DATA
TIRE PLUNGER DATAAvg. Force, Lb. .................. 1671Avg. Penetration, In. ............ 4.08Avg. Energy, In.-Lb. ............. 3406
5 Bottom
3/4 In. Plunger, 2 In./Min. @ 26 PSI
INDIVIDUAL BREAKS (DOT 139 Procedure)PENETRATION (In.) LOAD (Lb.) PLUNGER ENERGY (In. - Lb.)
4.16 1768 3677 Bottom4.04 1632 3297 Bottom4.05 1661 3364 Bottom4.07 1651 3360 Bottom4.06 1642 3333 Bottom
Minimum DOT Plunger Energy - 2600 In. - Lb.
December 15, 2014Copyright 2014 by Smithers Rapra, Inc.All rights reserved.
Sheet #4Spec. No. 1538-IT
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