Disc brake rotor adapter, disc brake rotor comprising the adapter and magnetism generating device

摘要

In order to provide a disc brake rotor adapter, which is preferably used to detect a state of rotation of a bicycle wheel, a disc brake rotor including the adapter, and a magnetism generating device, a disc brake rotor adapter is formed to attach a disc brake rotor main body to a hub of a bicycle. The adapter includes an adapter main body, a magnetism generating portion, and a fixing portion. The adapter main body includes an inner portion including a second spline formed to be engaged with a first spline provided on the hub and an outer portion to which the disc brake rotor main body is coupled. The fixing portion fixes the magnetism generating portion to the adapter main body in a manner irrelevant to a fixing function of a fixing member. The fixing element is designed to fix the adapter to the hub.