INSPECTION AND MAINTENANCE
Motorcyclists are strongly encouraged to be aware of their tyres' visual condition such as tread depth, cracking of the tread or sidewall rubber, cuts or bulges, foreign objects, as well as being alert to any change in dynamic performance or behaviour such as air loss, noise or vibration.
Driving over potholes, kerbs and speed bumps, even at low speeds can result in the weakening or fracture of the tyre structure.
Riders experiencing an in-service impact should ensure immediate inspection by a tyre professional. Lumps and bulges can indicate internal damage and should be examined by a tyre specialist without delay.
Tyre treads are designed to give good wet grip but the road surface also plays a significant role in tyre to road adhesion. In general, wet grip decreases as tyre tread patterns wear down and as the depth of surface water increases. Riders should take this into consideration and reduce speed in wet conditions. Motorcycle tyres normally have tread wear indicators in the tread grooves and as these are approached, you should consider replacement. Once the indicators are level with the tread surface the tyre should be replaced.
The legal limit of tyre tread depth in the UK for motorcycles over 50cc is 1mm across ¾ of the width of the tread pattern and with visible tread on the remaining ¼. For motorcycles up to 50cc the law requires that all the grooves of the original tread pattern must be clearly visible.