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:

Passenger Safety Belt Reminder Light
There is a passenger safety belt reminder light near the passenger airbag status indicator. See Passenger Sensing System on page 3-25. When the vehicle is started, this light flashes and a chime may come on to remind passengers to fasten their safety belt. Then the light stays on solid until ...

If the On Indicator Is Lit for a Child Restraint
If a child restraint has been installed and the on indicator is lit: Turn the vehicle off. Remove the child restraint from the vehicle. Remove any additional items from the seat such as blankets, cushions, seat covers, seat heaters, or seat massagers. Reinstall the child restraint follo ...

OnStar Additional Information
Transferring Service Press to request account transfer eligibility information. The Advisor can assist in canceling or removing account information. Selling/Transferring the Vehicle Call 1-888-4-ONSTAR immediately to terminate your OnStar services if the vehicle is disposed of, sold, trans ...

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