Buick RIVIERA 1993 Owner's Manual download pdf (Page 250)

Buying New .Tires

To find out what kind and size of tires you need, look at

:the Tire-Loading Information label.

The tires installed on your vehicle when it was new had

a Tire Performance Criteria Specification (TPC Spec)

number on each tire’s sidewall. When you get new tires,

:get ones with that same TPC Spec number. That way,

*your vehicle will continue to have tires that are designed

to give proper endurance, handling, speed rating,

traction, ride and other things during normal service on

your vehicle. If your tires have an all-season tread

design, the TPC number will be followed by a

“MS’,

(for mud and snow).

;If

you ever replace your tires with those not having a

!.TPC Spec number, make sure they are the same size,

load rdnge, speed rating and construction type (bias,

bias-belted or radial) as your original tires.

CAUTION:

Mixing tires could cause you to lose control

while driving.

you mix tires of different sizes

or types (radial and ‘bias-belted tires), the

vehicle may not handle properly, and you cou’

’

have a crash. Be sure to use the same size ana

type tires on all four wheels.

It’s

all

right to drive with your compact spa

though. It was developed for use

your

vehicle.

Uniform Tire

Quality

Grading

The following information relates to the system

developed by the United States National Highway

Traffic Safety Administration which grades tires by

treadwear, traction and temperature performance. (This

applies only to vehicles~ sold.in the United States.)

Treadwear

The treadwear grade is a comparative rating based on

the wear rate of the tire when tested under controlled

conditions on a specified government test course. For

example, a tire graded

150

would wear one and a half

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Buick RIVIERA 1993 Owner's Manual Page 250

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