Regularly checking the tread on all four of your tyres can help diagnose potential problems. Check them at least once a month, as well as before and after long journeys.
Tyre tread is vitally important for grip, traction and resistance to aquaplaning. A brand new tyre will have around 8mm of tread and over time, with regular driving it will begin to wear down. Uneven wear might be a sign of incorrect tyre pressure or a wheel alignment issue.
In the UK, the legal limit of tyre tread is 1.6mm, but it’s important to check tyres regularly and keep them well maintained. For winter tyres, you should consider changing your tyres at 4mm of tread.