Volvo 2009 C30 Owner's Manual download pdf (Page 174)

07 Wheels and tires

Glossary of tire terminology

07

174

Terminology

•

Tire information placard: A placard

showing the OE (Original Equipment) tire

sizes, recommended inflation pressure,

and the maximum weight the vehicle can

carry.

•

Tire Identification Number (TIN): A num-

ber on the sidewall of each tire providing

information about the tire brand and man-

ufacturing plant, tire size and date of man-

ufacturer.

•

Inflation pressure: A measure of the

amount of air in a tire.

•

Standard load: A class of P-metric or Met-

ric tires designed to carry a maximum load

at 35 psi [37 psi (2.5 bar) for Metric tires].

Increasing the inflation pressure beyond

this pressure will not increase the tires load

carrying capability.

•

Extra load: A class of P-metric or Metric

tires designed to carry a heavier maximum

load at 41 psi [43 psi (2.9 bar) for Metric

tires]. Increasing the inflation pressure

beyond this pressure will not increase the

tires load carrying capability.

•

kPa: Kilopascal, a metric unit of air pres-

sure.

•

PSI: Pounds per square inch, a standard

unit of air pressure.

•

B-pillar: The structural member at the side

of the vehicle behind the front door.

•

Bead area of the tire: Area of the tire next

to the rim.

•

Sidewall of the tire: Area between the

bead area and the tread.

•

Tread area of the tire: Area of the perim-

eter of the tire that contacts the road when

mounted on the vehicle.

•

Rim: The metal support (wheel) for a tire or

a tire and tube assembly upon which the

tire beads are seated.

•

Maximum load rating: a figure indicating

the maximum load in pounds and kilo-

grams that can be carried by the tire. This

rating is established by the tire manufac-

turer.

•

Maximum permissible inflation pres-

sure: the greatest amount of air pressure

that should ever be put in the tire. This limit

is set by the tire manufacturer.

•

Recommended tire inflation pressure:

inflation pressure, established by Volvo,

which is based on the type of tires that are

mounted on a vehicle at the factory. This

inflation pressure is affected by the number

of occupants in the car, the amount of

cargo, and the speed at which the vehicle

will be driven for a prolonged period. This

information can be found on the tire infla-

tion placard(s) located on the driver's side

B-pillar or on the inside of the fuel filler door

on Canadian models, and in the tire infla-

tion table in this chapter.

•

Cold tires: The tires are considered to be

cold when they have the same temperature

as the surrounding (ambient) air. This tem-

perature is normally reached after the car

has been parked for at least 3 hours.

Properly loading your vehicle will provide maxi-

mum return of vehicle design performance.

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