Wheels and tires – FORD 2015 Mustang User Manual

Page 246

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Federal Motor Vehicle Safety

Standard No. 139. Grades B and A

represent higher levels of

performance on the laboratory

test wheel than the minimum
required by law.

Glossary of Tire Terminology

*Tire label: A label showing the
original equipment tire sizes,
recommended inflation pressure
and the maximum weight the
vehicle can carry.

*Tire Identification Number
(TIN): A number on the sidewall

of each tire providing information

about the tire brand and
manufacturing plant, tire size and

date of manufacture. Also referred

to as DOT code.
*Inflation pressure: A measure

of the amount of air in a tire.
*Standard load: A class of

P-metric or Metric tires designed
to carry a maximum load at set

pressure. For example: For

P-metric tires 35 psi (2.4 bar) or

36 (2.5 bar) depending on tire size

and for Metric tires 36 psi (2.5

bar). Increasing the inflation
pressure beyond this pressure will

not increase the tire capability.
*Extra load: A class of P-metric
or Metric tires designed to carry a
heavier maximum load at 42 psi
(2.9 bar). Increasing the inflation
pressure beyond this pressure will
not increase the tire’s load
carrying capability.

*kPa: Kilopascal, a metric unit of

air pressure.
*PSI: Pounds per square inch, a
standard unit of air pressure.

*Cold tire pressure: The tire
pressure when the vehicle has
been stationary and out of direct
sunlight for an hour or more and
prior to the vehicle being driven for
1 mile (1.6 km).

*Recommended inflation
pressure: The cold inflation
pressure found on the Safety
Compliance Certification Label

(affixed to either the door hinge

pillar, door-latch post, or the door

edge that meets the door-latch
post, next to the driver's seating

position), or Tire Label located on

the B-Pillar or the edge of the

driver’s door.
* 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 perimeter 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.

243

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Wheels and Tires

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