Tire Basics
Wheel Basics
Common Speed Ratings
Load Index/ Load Range
TPMS
100

What does the R stand for in P225/45/R17

Radial

100

What is the main advantage of a steel wheel over alloy wheel?

Lower cost

100

What speed rating is a T tire rated up to?

118 mph

100

What is the ply rating of a standard load (SL) tire?

4 Ply Rating

100

What is the primary function of a TPMS system?

To monitor and report tire pressure.

200

a high flotation tire size of 31x10.50R15 would have an overall diameter of how many inches?

31 inches tall (diameter)

200

What is the most common material used in the construction of modern car wheels?

Aluminum alloy

200

What speed rating is an H rated up to?

130 mph

200

What is the ply rating of a Load Range E (LRE) tire?

10 Ply Rating

200

How often does DTC recommend checking air pressure?

Monthly

300

What does M&S Stand for?

Mud and Snow

300

What is the function of hub-centric rings?

To align the wheel with the hub

300

What speed rating is a V rated up to?

149 mph

300

What is the ply rating of a Load Range D (LRD) tire?

8 Ply Rating

300

How much does Discount Tire charge to perform a TPMS relearn/ reset?

Free

400

A consistent temperature of below 45 degrees F is ideal for this type of tire.

Winter tires

400

Are Original Equipment wheels hub centric, or lug centric?

Hub Centric

400

What speed rating is a W rated up to?

168 mph

400

What is the ply rating of a Load Range C (LRG) tire?

6 Ply Rating

400

This TPMS system estimates an underinflated tire through wheel speed sensors used by the anti-lock brake system.

Indirect TPMS

500

What are FIVE free tires services that Discount Tire offers to our customers that buy tires from us?

Free Rotations, Balancing, Air Checks, Inspections, Flat Repairs, TPMS reset. 

500

What is one of the main benefits of aluminum (alloy) wheels?

They are lighter weight

500

For tires with a maximum speed capability above this speed, a ZR MUST appear in the size description.

185 mph 

500

What is the ply rating of a load range F (LRF) tire?

12 Ply Rating

500

What are the four main components of a metal TPMS rebuild kit?

Grommet, Retaining nut, Core, Cap