To check tyre tread properly, use the 20p coin test (or a penny if you’re in the US): insert the coin into the main tread groove; if the outer band is visible, the tread is below the 1.6mm legal limit ...

You can check your tyre tread depth in seconds using a coin from your pocket. In the UK, insert a 20p coin into the tread groove. If the outer ring disappears, your tread is above the 1.6mm legal ...