Safetire anti-puncture tape works to protect the camera against piercing objects. Model compatible with 27" or 700C rims, 23 mm wide. Remove the wheel from the bicycle and deflate the tube. Remove the inner tube from the tire. Safetire tape must be installed between the tube and the tire (Use talcum powder to help during installation, if necessary). Place the Safetire tape inside the tire, with the ends of the tape overlapping (Do not cut the spare ends) and install the tire on the wheel and calibrate according to the tire. manufacturer.