Selecting the right tread pattern for tires used on the often-hostile road surface of a construction site, as shown here on this dump truck, can help resist "chipping and chunking" caused by stones ...

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 ...