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(FM8) SEMCON JLR OWNER GUIDE VER 1.00 NAS
LANGUAGE: english-NAS-en; MARQUE: jaguar; MODEL: XJ
Tires
182
If tread wear is uneven across the tire, or a tire
wears excessively, the vehicle should be
checked by your Dealer/Authorized Repairer as
soon as possible.
TRACTION
The traction grades, from highest to lowest, are
AA, A, B, and C. The grades represent the tire’s
ability to stop on wet pavement as measured
under controlled conditions on specified
government test surfaces of asphalt and
concrete. A tire marked C may have poor
traction performance.
The traction grade assigned to this tire is
based on straight-ahead braking traction
tests and does not include acceleration,
cornering, hydroplaning, or peak traction
characteristics.
TEMPERATURE
The temperature grades are A (the highest), B,
and C, representing the tire’s resistance to the
generation of heat and its ability to dissipate
heat when tested under controlled conditions
on a specified indoor laboratory test wheel.
Sustained high temperature can cause the
material of the tire to degenerate and reduce
tire life, and excessive temperature can lead to
sudden tire failure.
The grade C corresponds to a level of
performance which all passenger car tires
must meet under the Federal Motor Vehicle
Safety Standard No. 109.
Grades B and A represent higher levels of
performance on the laboratory test wheel than
the minimum required by law.
The temperature grade for this tire is
established for a tire that is properly inflated
and not overloaded. Excessive speed,
underinflation, or excessive loading, either
separately or in combination, can cause heat
buildup and possible tire failure.
TIRE GLOSSARY
lbf/in² or psi
Pounds per square inch, an imperial unit of
measure for pressure.
kPa
Kilo Pascal, a metric unit of measure for
pressure.
Cold tire pressure
The air pressure in a tire which has been
standing in excess of three hours, or driven for
less than one mile.
Maximum inflation pressure
The maximum pressure to which the tire
should be inflated. This pressure is given on
the tire side wall in lbf/in
2
(psi) and kPa.
Note: This pressure is the maximum allowed
by the tire manufacturer. It is not the pressure
recommended for use.
Curb weight
The weight of a standard vehicle, including a
full tank of fuel, any optional equipment fitted,
and with the correct coolant and oil levels.
Gross vehicle weight
The maximum permissible weight of a vehicle
with driver, passengers, load, luggage and
equipment.