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:

Airbag System
The vehicle has the following airbags: A frontal airbag for the driver. A frontal airbag for the front outboard passenger. A knee airbag for the driver. A knee airbag for the front outboard passenger A seat-mounted side impact airbag for the driver. A seat-mounted side impact airbag fo ...

Online Owner Center
Online Owner Experience (U.S.) my.chevrolet.com The Chevrolet online owner experience allows interaction with Chevrolet and keeps important vehicle-specific information in one place. Membership Benefits (Vehicle Information): Download owner manuals and view vehicle-specific how-to videos. ...

Doors
Liftgate Warning Exhaust gases can enter the vehicle if it is driven with the liftgate, hatch/trunk open, or with any objects that pass through the seal between the body and the hatch/trunk or liftgate. Engine exhaust contains carbon monoxide (CO) which cannot be seen or smelled. It can caus ...

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