Cleaning device for bicycle rim braking surface, comprises leading projection on brake block, which contacts rim just before braking takes place

摘要

A flexible component (4) connected to the leading (with respect to wheel rotation) end of each brake block (2) projects (a) towards the rim (1). When the brake is released, it is out of contact with the rim. During brake application, it contacts the braking surface (1a) of the rim just before the brake block touches it.