Chevrolet Spark manuals

Chevrolet Spark Owners Manual: Tire Designations

Tire Size

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

Chevrolet Spark. Tire Size


(1) 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.

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

(3) 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 3 of the illustration, it would mean that the tire's sidewall is 60 percent as high as it is wide.

(4) 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.

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

(6) 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 tire sidewall. Passenger (P-Metric) Tire Example (1) Tire Size: The tire size is a combinatio ...

Tire Terminology and Definitions
Air Pressure: The amount of air inside the tire pressing outward on each square inch of the tire. Air pressure is expressed in kPa (kilopascal) or psi (pounds per square inch). Accessory Weight: ...

Other materials:

Customer Assistance Offices
Chevrolet encourages customers to call the toll-free number for assistance. However, if a customer wishes to write or e-mail Chevrolet, the letter should be addressed to: United States and Puerto Rico Chevrolet Motor Division Chevrolet Customer Assistance Center P.O. Box 33170 Detroit, MI ...

Airbag Readiness Light
This light shows if there is an electrical problem with the airbag system. The system check includes the airbag sensor(s), passenger sensing system, the pretensioners (if equipped), the airbag modules, the wiring, and the crash sensing and diagnostic module. For more information on the airbag ...

Vehicle Personalization
Personalization Menu (Radio without Touchscreen) The audio system controls and touchscreen are used to access the personalization menus for customizing vehicle features. The following are all possible personalization features. Depending on the vehicle, some may not be available. CONFIG (Confi ...

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