SHIMANO – Flat Mount – Mechanical Disc Brake – Front + Rear Caliper. The SHIMANO RS305 mechanical disc brake is easy to control as well as set up and maintain. It mounts via SHIMANO’s Flat Mount interface. Easy to control and clean appearance with stable brake performance for ordinary riders. ICE TECHNOLOGY pad with fin. Low profile disc caliper. SHIMANO Flat mount system. Easy set up and maintenance. Both 140mm and 160mm rotor available with one bracket. SHIMANO Easy Flip-Flop bracket system. Package:No original packaging.