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 ...

Tire tread helps give your car grip and control, but when tires go bald, you're not stopping, you're probably skidding to the sound of pure regret. Those grooves help channel away water, slush, debris ...