The black stuff that keeps us on the road and a legal limit that the police will fine you for should they drop below.
- Correct tyre sizes on the same axle
- Correct rotation
- Inflated enough
Minimum tread depth 1.6mm over ¾ of the tread and the other ¼ must be visible; a good guide is 2 mm all over the tread as a minimum Wheels also have to be undamaged and secure to the car.