Chevrolet VENTURE 2004 Spezifikationen PDF herunterladen (Seite 417)

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tire height-to-width measurements. For example, if

the tire size aspect ratio is “75,” as shown in item “C” of

the illustration, it would mean that the tire’s sidewall

is 75% 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: The service description

indicates the load range and speed rating of a tire. The

load index can range from 1 to 279. Speed ratings

range from “A” to “Z”. The light truck tire size example

above shows dual or single tire conﬁgurations.

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 pounds per square inch (psi) or

kilopascal (kPa).

Accessory Weight: This means the combined weight

of optional accessories. Some examples of optional

accessories are, automatic transmission, power steering,

power brakes, power windows, power seats, and air

conditioning.

Aspect Ratio: The relationship of a tire’s height to its

width.

Belt: A rubber coated layer of cords that is located

between the plies and the tread. Cords may be made

from steel or other reinforcing materials.

Bead: The tire bead contains steel wires wrapped by

steel cords that hold the tire onto the rim.

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