Tyres become unsafe when they’re worn, giving less grip, especially on wet roads. Worn tyres can also affect braking ability.
Abnormal or uneven tread wear can indicate a mechanical defect on your vehicle such as steering, wheel alignment or brake. This is a sign that you need to take your car in for servicing soon.
As tyre wear is a gradual process it can be hard to tell when your tyres need changing.
Violent impact or kerbing can cause car tyres to develop cuts, cracks or bulges. Check your tyres regularly as damaged tyres may be illegal and can be dangerous.