Changing Tyres : Valves
The tyre valve is often the most neglected and overlooked component within the wheel and tyre assembly, yet an efficient valve is important for the safe operation of the tyre.
Wear on the valve seal, damaged screw threads, dirt and grit in the valve itself can lead to failure of the tyre at speed. Even a poorly sealed valve can cause fairly constant under inflation of the tyre which will reduce the life of your tyre by up to 25%. As it is impossible to replace the valve without removing the tyre casing from the wheel - National Tyres and Autocare recommend that the valves are replaced EVERY time a tyre is replaced.