Replacement Tires

A Tire Performance Criteria (TPC) specification number is molded in the sidewall near the tire size of all original equipment tires. This specification number assures that the tire meets performance standards for traction, endurance, dimensions, noise handling, rolling resistance, and others. Usually, a specific TPC number is assigned to each tire size.

CAUTION: Do not mix different types of tires on the same car such as radial, bias and bias-belted tires except in emergencies, because vehicle handling may be seriously affected and may result in loss of control.

When replacing tires, only the size, load range and construction as originally on the vehicle are recommended. This can best be accomplished by replacing with tires of the same TPC specification number. Use of any other tire size or construction type may seriously affect ride, handling, speedometer/odometer calibration, vehicle ground clearance and tire clearance to the body and chassis. This does not apply to the spare furnished with the vehicle.

It is recommended that new tires be installed in pairs on the same axle. If it is necessary to replace only one tire, it should be paired with the tire having the most tread, to equalize braking traction.

Although they may appear different in tread design, tires built by different manufacturers with identical TPC specification numbers can be intermixed on the same vehicle.

Tires should be replaced when:
^ They are worn to a point where 1.6 mm (1/16 inch) or less tread remains, or the cord or fabric is showing. To help detect this, tires have built-in tread wear indicators that appear between the tread grooves when the tread is 1.6 mm (1/16 inch) or less. When the indicators appear in two or more adjacent grooves at three spots around the tire, the tire should be replaced.
^ The tread or sidewall is cracked, cut or snagged deep enough to expose the cord or fabric.
^ The tire has a bump, bulge or split. Slight sidewall indentations are normal and should not affect ride.
^ The tire has a puncture, cut, or other damage that cannot be correctly repaired, because of the size or location of the damage.