Jaguar X-Type JJM 21 02 20/15 - Manual (Page 168)

7-18 Maintenance
Tyres
Tyres of the correct type, manufacturer
and dimensions, with correct cold
inflation pressures are an integral part of
every vehicle’s design. Regular
maintenance of tyres contributes not only
to safety, but to the designed function of
the vehicle. Road-holding, steering and
braking are especially vulnerable to
incorrectly pressurised, badly fitted or
worn tyres.
Tyres of the correct size and type, but of
different make have widely varying
characteristics. It is therefore
recommended that Jaguar approved tyres
are fitted to all wheels.
Do not interchange tyres from side to
side, front to rear or vice versa as tyre
wear produces characteristic patterns
depending upon their position and, if the
position is changed after wear has
occurred, the performance of the tyre will
be adversely affected.
A tyre recommendation placard is placed
on the inside of the fuel filler flap, giving
information specific to the vehicle’s
wheel and tyre equipment.
Always ensure that the wheel nuts are
fully seated before finally tightening the
nuts in alternate sequence.
Tyre renewal
When renewal of tyres is necessary it is
preferable to fit a complete vehicle set.
Should either front or rear tyres only
show need for renewal, new tyres must
be fitted, as axle sets, to replace worn
ones.
Note: After new tyres have been fitted
the wheels need to be dynamically
balanced.
The radial ply tyres specified are designed
to meet the high-speed performance
capability of this vehicle.
Do not fit tyres with a different tread
pattern, size or speed rating.
Tyre pressures
The tyre pressures recommended (see
page 8-5) provide optimum ride and
handling characteristics for all normal
operating conditions. The pressures
should be checked, and correctly set, if
necessary, once per week. This should be
done with the tyres cold. Tyre
temperatures and pressures increase
when running.
Deflating a warm tyre to the
recommended pressure will result in
under-inflation which may be dangerous.
A slight natural pressure loss occurs with
time. If this exceeds 0,14 bar (14 kPa,
0,14 kg/cm
2 ) per week, the cause should
be investigated and rectified.
It is an offence in certain countries to
drive a vehicle with tyres that are not
inflated in accordance with the vehicle’s
proper use.