Why Tread Depth Matters More Than You Think

Your tyres are the only part of your vehicle that touches the road. Despite this, tread depth is one of the most overlooked aspects of vehicle maintenance. Let’s look at why it matters so much.

The Legal Minimum

In the UK, the legal minimum tread depth is 1.6mm across the central three-quarters of the tyre, around its entire circumference. Driving below this limit can result in a fine of up to £2,500 and three penalty points — per tyre.

That means four illegal tyres could land you a £10,000 fine and 12 points, enough to lose your licence.

Safety Impact

Tread depth directly affects your ability to stop in wet conditions. Tests show that:

• At 3mm, stopping distances begin to increase noticeably
• At 1.6mm, stopping distances in the wet can be double compared to new tyres
• Below 1.6mm, aquaplaning risk increases dramatically

Many safety experts recommend replacing tyres at 2-3mm rather than waiting for the legal minimum.

Uneven Wear Tells a Story

Tread doesn’t always wear evenly. Monitoring wear patterns across the tyre can reveal:

• Centre wear — over-inflation
• Edge wear — under-inflation
• One-sided wear — alignment issues
• Patchy wear — suspension or balancing problems

Catching these early saves you money on premature replacements and can flag mechanical issues before they become serious.

Track It, Don’t Guess

This is exactly why we built Tyre Tracks. Instead of guessing when your tyres need replacing, the app tracks your tread depth over time, estimates replacement dates, and alerts you to uneven wear patterns.

Whether you drive a daily commuter or a high-performance sports car, knowing your tread depth keeps you safe and saves you money.

Download Tyre Tracks and start tracking today.