Bicycle wheel rim with a wear-indicating projection

摘要

A bicycle wheel rim includes an annular rim body having a central axis. The annular rim body includes annular left and right side walls spaced apart from each other. Each of the side walls has a radial inner edge proximate to the central axis, a radial outer edge distal to the central axis, and a lateral outer brake pad contacting surface opposite to the other one of the side walls. The annular rim body further includes an annular base wall interconnecting the radial inner edges of the left and right side walls. The brake pad contacting surface of each of the side walls is formed with a wear-indicating projection adapted to be in frictional contact with a brake pad. The wear-indicating projection is formed as a continuous annular projection that extends along a respective one of the side walls. The brake pad contacting surface gradually wears out during use of the bicycle wheel rim to eventually render the wear-indicating projection to wear off, thereby indicating that wearing of the bicycle wheel rim to a predetermined extent has occurred.