Wheels and tires
For wheel and tire specifications (pressure, tightening torques, etc.). Specification
When changing wheels or tires, you must ensure that you comply with local health and safety regulations.
If your vehicle is equipped with a tire pressure monitoring system, only rims and wheels recommended by Jaguar may be used. If wheel and tire size changes (e.g. from R18 to R20), the correct pressure information must be entered into the tire pressure monitoring system module for the new wheel/tire combination. Update the information in the TPMS module using the Jaguar approved diagnostic system.
As a general guide, remember that tires should only be replaced in pairs or as a set, and only with tires of equivalent size and specification.
Check for symptoms reported by the customer.
Ask the driver as much as possible to make it easier to diagnose the cause.
Before performing a road test, perform a basic inspection to ensure that the vehicle is in good condition to meet safety and legal requirements.
Basic inspection
- Correct tire pressure.
- Permissible tire tread depth
- Cuts/bulges in tire sidewalls
- Tire delamination
- Foreign objects inside the tire
- Wheel rim damage
- Proper tire installation (specification, direction of rotation, etc.)
- Any obvious tire deformation (flat spots/bulges)
- Worn/damaged steering or suspension components
Road test
If the basic inspection is satisfactory, carry out a road test to ensure that the stated symptoms are present.
To reproduce the symptoms of a malfunction, test the vehicle on roads similar to those on which the malfunction occurs and at similar speeds (if the rules of the road allow it).
If the vibration or noise can be reproduced, notice the speed at which it appears and see if you can make it go away by moving faster or slower.
If possible, the problem is likely caused by a wheel or tire imbalance.
If the vibration or noise increases as the vehicle speed increases, the problem is likely caused by wheel or tire deformation, or worn or damaged components.
Deformation checks
Check for deformation. To do this, raise the car so that the wheels hang freely, and place a secure support under the car next to each wheel in turn.
If the support is installed under the tire tread, the tire can be checked for out-of-roundness by manually turning the wheel and checking it for a decrease or increase in the gap between the tread and the support.
If the support is installed next to the wheel rim or tire sidewall, the wheel and tire can be checked for end runout in a similar way.
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