Where are you not allowed to use retread tyres on 100 km/h buses?

You are not allowed to use retread tyres on the front axle of buses that travel at speeds up to 100 km/h. This rule exists because the front axle plays a critical role in steering and overall vehicle safety. Retread tyres may have lower performance compared to new tyres, especially under heavy loads and high speeds, so regulations require only new tyres on the front steering axle for such vehicles. On the rear axle, retread tyres are generally permitted. Always ensure that the front axle of high-speed buses is equipped with new, non-retread tyres for safety and to comply with German traffic regulations.