07 Wheels and tires

 

 

 

 

 

 

 

 

 

 

 

 

 

Glossary of tire terminology

 

 

 

 

 

• Tire information placard: A placard

• Bead area of the tire: Area of the tire next

perature is normally reached after the vehi-

 

showing the OE (Original Equipment) tire

to the rim.

cle has been parked for at least 3 hours.

 

sizes, recommended inflation pressure,

• Sidewall of the tire: Area between the

 

 

 

and the maximum weight the vehicle can

bead area and the tread.

 

 

 

carry.

 

 

 

• Tread area of the tire: Area of the perim-

 

 

• Tire Identification Number (TIN): A num-

 

 

eter of the tire that contacts the road when

 

 

 

ber on the sidewall of each tire providing

mounted on the vehicle.

 

 

 

information about the tire brand and man-

 

 

 

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

 

 

 

ufacturing plant, tire size and date of man-

 

 

 

ufacturer.

a tire and tube assembly upon which the

 

 

 

tire beads are seated.

 

 

• Inflation pressure: A measure of the

 

 

• Maximum load rating: a figure indicating

 

 

 

amount of air in a tire.

 

 

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

the maximum load in pounds and kilo-

 

 

grams that can be carried by the tire. This

 

 

 

ric tires designed to carry a maximum load

rating is established by the tire manufac-

 

 

 

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

 

 

 

turer.

 

 

 

Increasing the inflation pressure beyond

 

 

 

• Maximum permissible inflation pres-

 

 

 

this pressure will not increase the tires load

 

 

 

carrying capability.

sure: the greatest amount of air pressure

 

 

 

that should ever be put in the tire. This limit

 

 

• Extra load: A class of P-metric or Metric

 

 

is set by the tire manufacturer.

 

 

 

tires designed to carry a heavier maximum

• Recommended tire inflation pressure:

 

 

 

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

 

 

 

tires]. Increasing the inflation pressure

inflation pressure, established by Volvo,

 

 

 

which is based on the type of tires that are

 

 

 

beyond this pressure will not increase the

 

 

 

mounted on a vehicle at the factory. This

 

 

 

tires load carrying capability.

 

 

 

information can be found on the tire infla-

 

 

• kPa: Kilopascal, a metric unit of air pres-

 

 

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

 

 

 

sure.

B-pillar and in the tire inflation table in this

 

 

• PSI: Pounds per square inch, a standard

 

 

chapter.

 

 

 

unit of air pressure.

• Cold tires: The tires are considered to be

 

 

• B-pillar:The structural member at the side

cold when they have the same temperature

 

 

 

of the vehicle behind the front door.

as the surrounding (ambient) air. This tem-

 

 

07

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Volvo XC90 owner manual Glossary of tire terminology, Sidewall of the tire Area between, Maximum permissible inflation pres
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