UK Driving Theory Practice Exam 2026 - Free Driving Theory Practice Questions and Study Guide

The minimum legal tread depth for car tires in the UK is 1.6 mm. This depth is crucial for maintaining adequate grip and ensuring the vehicle can handle wet and slippery conditions safely. Tread depth affects the tire's ability to channel water away from the contact patch, reducing the risk of aquaplaning and enhancing overall road safety.

When tires are worn down to or below this tread depth, they can significantly impair handling, braking, and cornering performance, especially in adverse weather conditions. Therefore, regular checks of tire tread depth are essential for both legal compliance and safe driving. Ensuring that tires maintain at least the minimum tread depth will help in providing better traction and stability while driving.