Why is it critical to check tyre tread depth and tyre pressure regularly?

1. Adequate tread depth is essential to evacuate water and maintain grip, while correct pressure prevents tyre blowouts and uneven wear
2. Tyre tread depth determines the maximum volume of the vehicle's audio system
3. Under-inflated tyres increase maximum vehicle speed by 20 km/h
4. Tyres only require inspection once every five years during licence renewal