Tire and Wheel Tire and Wheel TheoryTheory

Chapter 54Chapter 54

Page 783Page 783

Tire TypesTire Types

How a Tire is BuiltHow a Tire is Built

Radial Tire Construction

Tires and What They Do

Non-Directional TiresNon-Directional Tires

Directional TiresDirectional Tires

Tire Tire CodesCodes

P 205/75 R 15P 205/75 R 15

P=Passenger TireP=Passenger Tire P-passenger TireP-passenger Tire T-TemporaryT-Temporary C-CommercialC-Commercial LT-Light TruckLT-Light Truck T-TruckT-Truck

205= Section width in Millimeters

75= Aspect Ratio

Height divided by Width (MM)

R= Radial Tires•R-Radial

•B-Bias Belted

•D- Diagonal

15= Rim Diameter

How to Read the Tire Information

Speed RatingSpeed Rating All tires are rated with a speed letter. This All tires are rated with a speed letter. This

indicates the maximum speed that the tire can indicates the maximum speed that the tire can sustain for a ten minute endurance without sustain for a ten minute endurance without coming to pieces and destroying itself.coming to pieces and destroying itself.

Letter MPHLetter MPH P 95P 95 Q 100Q 100 R 106R 106 S 112S 112 T 118T 118 U 124U 124 H 130H 130 V 150V 150 W 168W 168 Y 188Y 188 Z 188+Z 188+

Rim Rim OffsetOffset

Zero Offset Positive Offset Negative Offset

Positive and Negative offset will change how a vehicle steers and turns.

Road side Inside

Wheel DesignationWheel Designation

Type of WheelsType of Wheels

Lug Nut TypesLug Nut Types

This taper goes toward the rim to center the rim on the lug studs.

What for lug cap separation. This will cause you to strip the lugs because they are smaller when the caps are missing.

Valve Stems & CapsValve Stems & Caps

Pressure sensitive cap

Steel Rubber

Valve CoreValve Core

Short Long

Your Job.Your Job. Complete chapter Questions 1-10 Complete chapter Questions 1-10

(review) and 1-10 (ASE-style). Page (review) and 1-10 (ASE-style). Page 794-795794-795

Write on a separate paper and write out Write on a separate paper and write out the complete question and your answer. the complete question and your answer. ( do not write the other answer options). ( do not write the other answer options).

Complete the chapter worksheet (I will Complete the chapter worksheet (I will give it out). You may write on it. give it out). You may write on it.

File all items in your note book.File all items in your note book. Notebooks will be graded in the future.Notebooks will be graded in the future.