It is recommended that all new tyres be fitted on the rear axle.
Industry research shows that with new tyres on the rear, surface water will be better dispersed, improving straight-line braking ability. Conversely, if the rear has part worn tyres, there is a greater risk of the vehicle over-steering.
It has also been shown that there is often a greater loss of control when a rear tyre suffers a puncture, so it makes sense to fit the deeper, safer tread to the rear wheels.
Bear this in mind if changing tyres around. (SEE TYRE ROTATION)
The valve and valve cap provide a vital function in maintaining an airtight seal. Every valve deteriorates over time, and a faulty valve will allow air to escape, reducing tyre pressure and leading to tyre wear and possible danger.
For safety we recommend that you replace the valve each time you change a tyre. A valve cap with rubber seal must also be fitted.
Tyres need to be balanced to avoid vibration and other problems.
Incorrect wheel balance can lead to damage to the car’s suspension, steering and bearings. It can also cause premature and irregular tyre wear. We recommend balancing the rear wheels as well as the front wheels.
Penetration of the tread by a nail or other sharp object can often be safely repaired. British Standard BS AU159 sets out the rules for repair. Repairs are possible within the main tread area, but the shoulder and sidewall are non-repairable. Before the repair can be made, the tyre has to be removed from the wheel to check for internal damage.
Because of this, externally applied plugs and liquid sealants injected through the tyre valve are not considered suitable as a permanent repair. The regulations state that there is no limit to the number of repairs that can be carried out on a tyre, but tyres speed rated V and above can only be repaired once.
Only a special vulcanised plug patch should be used and these must not overlap. Also, tyres must have at least 1.6mm of tread remaining, with no sidewall or run-flat damage.
Motorists should never attempt their own tyre repairs. It could prove fatal in the event of the repair failing at speed.