Buick Regal: Tire Designations

Buick Regal: Tire Designations

Tire Size

The following is an example of a typical passenger vehicle tire size.

(A) Passenger (P-Metric) Tire: The United States version of a metric tire sizing system.

(A) Passenger (P-Metric) Tire: The United States version of a metric tire sizing system.

The letter P as the first character in the tire size means a passenger vehicle tire engineered to standards set by the U.S. Tire and Rim Association.

(B) Tire Width: The three-digit number indicates the tire section width in millimeters from sidewall to sidewall.

(C) Aspect Ratio: A two-digit number that indicates the tire height-to-width measurements.

For example, if the tire size aspect ratio is 60, as shown in item C of the illustration, it would mean that the tire's sidewall is 60 percent as high as it is wide.

(D) Construction Code: A letter code is used to indicate the type of ply construction in the tire. The letter R means radial ply construction; the letter D means diagonal or bias ply construction; and the letter B means belted-bias ply construction.

(E) Rim Diameter: Diameter of the wheel in inches.

(F) Service Description: These characters represent the load index and speed rating of the tire. The load index represents the load carrying capacity a tire is certified to carry. The speed rating is the maximum speed a tire is certified to carry a load.

Tire Sidewall Labeling
Useful information about a tire is molded into its sidewall. The examples show a typical passenger vehicle tire and a compact spare tire sidewall. Passenger (P-Metric) Tire Example (A) Tire Size: T ...
See also:

Automatic/Emergency Locking Retractor (A/ELR)
Each passenger’s seatbelt has an Automatic/ Emergency Locking Retractor (A/ ELR). The Automatic/Emergency Locking Retractor normally functions as an Emergency Locking Retractor (ELR). The A/ ELR ...

Tires
Use a stiff brush with tire cleaner to clean the tires. Notice: Using petroleum-based tire dressing products on the vehicle may damage the paint finish and/or tires.

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  • Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations

    Buick Regal: Tire Designations