Where is it generally not allowed to have recapped or regrooved tires on a bus?

Recapped or regrooved tires are generally not permitted on the front wheels of a bus because of the critical role that these tires play in steering and handling. The front tires are responsible for maintaining control of the vehicle and providing traction, especially during maneuvers like turning and emergency stops. Using recapped or regrooved tires in these locations increases the risk of tire failure, which can lead to loss of control and serious accidents.

While there are specific regulations that govern the use of recapped or regrooved tires in various applications, safety standards typically dictate that tires used on steering axles be in optimal condition to ensure reliable performance. Tires that have been recapped or regrooved may not perform as well as new tires, especially under the stresses encountered by tires on the front of a bus. Therefore, these tires are often limited to non-steering axles, where the consequences of a tire failure are less severe in terms of vehicle control.