for checking tyre tread depths
Ideally, tyre tread depth
should be checked at least once a month at the same time that you check your
If you do not have a calibrated
tread depth gauge a 20p coin provides a useful guide.
- Insert the 20p coin into
the main tyre grooves at several places around the circumference of the tyre
and across its width.
- If the outer band of
the 20p coin is visible whenever you check the tread, your tread depth may
be illegal and you should have them checked by a qualified tyre specialist.
- When checking your tread
depth, give the rest of the tyres a visual inspection for any cuts or bulges
and remove any stones or objects embedded in the tread.