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Wheels and Tyres

By law the grooves of a tyre tread must be at least 1.6mm deep in the middle threequarters of the tyre, all the way round. 2mm is normally better for handling wet conditions.

Some car makers recommend a deeper tread for certain cars. Check your handbook to be sure. Make sure you know what your tyre pressures should be (see your handbook) and check them fortnightly when the tyres are cold.

Types of tyre wear can mean different things:

Symptom Possible Problem
Wear on the outer edges Tyres under-inflated
Wear in the centre Tyres over-inflated
Wear on one side Wheels not properly aligned

(power steering can also cause this)

Steering wobble Wheels need balancing