Wheels and Tires: Description and Operation
Wheels and Tires
Locking Wheel Nuts
Locking wheel nuts are fitted to all UK and Mexico vehicles with alloy wheels, and are available as an accessory in certain other markets.
One locking wheel nut is fitted to each road wheel and may only be removed by using the correctly coded socket.
Locking wheel nuts are available in one length only. The correct socket, and cover removal tool if required, is supplied with the vehicle tool kit. Sets of sockets are available to Jaguar dealers.
Recommended Tires
The radial ply tires recommended by Jaguar meet the high speed performance of the vehicle. Only tires of identical specification may be fitted as replacements. Under no circumstances must cross-ply tires be fitted.
Tire Inflation Pressures
All recommended tires, including winter tires, must be inflated to the pressures shown in the Specifications sub-section. Inflation pressures must only be checked when the tires are cold.
If it is necessary to use non-recommended tires, they must be inflated to 0.14 bar (2 lbf/in2) above the pressure for the recommended tires, Jaguar specified tires are marked with a letter 'J' on the side wall.
Tire Replacement and Wheel-Interchanging
When the replacement of a tire is necessary, it is preferable to fit a complete set. If two replacement tires are fitted (to one axle), they must be of the same manufacturer and type as those on the other axle.
No attempt must be made to interchange wheels from the front to the rear or vice-versa, as wear produces a characteristic pattern on each tire depending upon its position on the vehicle. If this position is changed after wear has occurred, the performance of the tire will be adversely affected.
New tires must be balanced before fitting to the vehicle.
Winter (Snow) Tires
Winter tires must only be fitted in complete four-wheel sets of the same type and size. The maximum speed with winter tires fitted (without snow chains) is 210 km/h (131 mile/h) for 'H' rated, and 240 km/h (150 mile/h) for 'V' rated.
When using snow chains, note that:
^ Snow chains must only be fitted to the driven wheels.
^ Only Jaguar approved snow chains should be used.
^ Snow chains must not be used on roads which are clear of snow.
^ The maximum speed with snow chains fitted is 48 km/h (30 mile/h).
^ Traction control (where fitted) must be switched OFF when using snow chains.
Rotational Indicators
Some recommended winter tires may have an arrow moulded in the sidewall to indicate the correct direction of rotation. It is essential that these tires are fitted so that the arrow is pointing in the direction of rotation.
Some of the recommended tires for normal and winter use have an asymmetric tread pattern. These tires have inside and outside markers which should be fitted appropriately to the wheel.
Temporary-Use Spare Wheel
In certain markets, the spare wheel supplied with the vehicle is of the temporary-use type; it is narrower than the normal road wheel and takes up less room in the wheel luggage compartment.
When using this type of spare wheel note that:
^ Maximum speed must not exceed 80 km/h (50 mile/h).
^ The normal road wheel must be replaced as soon as possible.
^ Only one temporary-use wheel may be fitted to the vehicle at any time.
^ Traction control (where fitted) must be switched OFF.
Tread Wear Indicator
Tread wear indicators are molded into the bottom of the tread grooves across the width of the tire. The tire must be renewed when tread wear indicators become visible, at the surface of the tread, in two or more adjacent tread grooves.
Note that tire tread depth and condition must comply with prevailing local legislation.