Tires and Wheels

Definitions

100

A device mounted in the rim or inner-tube to provide a method of increasing or decreasing air pressure in a tire

What is valve stem

200

straight distance from one sidewall of a tire to the other sidewall

What is section width

300

The part of a tire that contacts the rim

What is the Bead

400

Also called the tire profile...height/width

What is Aspect ratio

500

UTQG

What is uniform tire Quality grade

Wheel/Tire Problems

100

Under-inflated tires wear here

What is TREAD EDGES

200

Over-inflated tires wear here

What is TREAD CENTER

300

Statically imbalanced tires will do this at high speed.

What is HOP/BOUNCE

400

This is another word for steering wheel shake

What is SHIMMY

500

This type of tire has no consistent pattern across its tread

What is an ASYMMETRICAL TIRE

Different Types of Tires

100

Type T-

What is TEMPORARY USE

200

Type LT

What is LIGHT TRUCK tire

300

type P-

what is passenger tire

400

belts cross each other at 90 degree angles

What is RADIAL tire

500

Tire belts cross each other at 45 degree angles

What is Bias belted tires

Tire Sizes

100

I am the rim diameter required for a 235/75 R15 tire

What is 15".

200

The '265' in the tire size 265/75 R16

What is TREAD WIDTH.

300

This is the part of the tire that makes the most contact with the road

What is the CONTACT PATCH

400

The '85' in the tire size 295/85 R18

What is ASPECT RATIO or SECTION HEIGHT

500

A wheel that is centered by its centerbore is...

What is HUB CENTRIC

Random

100

This is the small piece that threads into the valve stem to hold the air in the tire.

What is VALVE CORE

200

When breaking the beads off the rim with the blade/shovel, where must the valve stem be positioned?

What is AWAY FROM THE BEAD BREAKER

300

Where can you find the correct inflation information for your tires?

What is the DOORJAMB STICKER

400

A TPMS system that can only detect a low pressure condition in general is...

What is INDIRECT TPMS

500

You would use this tool to measure the condition of your tread...

What is a TREAD DEPTH GAUGE