The current law for the tread depth for cars, vans and LCV is to have a minimum depth of 1.6mm across the central three-quarters of the tire and around the entire circumference.
It is recommended to increase the safety of the car to replace the tires before the 1.6mm limit is reached. Many vehicle manufactures’ suggest replacing the tires when they reach 3mm.
For any vehicles exceeding 3.5 tonnes the current law states that the tread should be a minimum of 1mm across the central three-quarters of the tire and around the entire circumference.
Motorcycles over 50cc the minimum tread is 1mm across three-quarters of the width of the tread pattern and a visible tread on the remaining quarter. Motorcycles up to 50cc are required to have all grooves of the original tire pattern clearly visible.