Wear-proof disk brake rotor for use in braking system of bicycle, has friction rings formed with continuous openings, where bulges of openings are engaged in inner periphery of holes so as to integrally attach friction rings on rotor body

摘要

The rotor has two friction rings (1) made of steel and formed with continuous openings (10). A rotor body (2) is provided between the friction rings and mounted on a wheel hub of a bicycle. The rotor body is made of light metal i.e. aluminum, and formed with continuous holes (20), which are formed around an outer edge of the rotor body, where length of the holes corresponds to length of the continuous openings. Bulges (11) of the openings are engaged in an inner periphery of the holes so as to integrally attach the friction rings on the rotor body.