retainersA metal or plastic holder for the bearing balls in a ball bearing. Use of a cage keeps the balls from bumping into one another, and allows the use of fewer balls. In the case of traditional cup-and-cone bearings used on bicycles, the primary purpose of caged balls is to save labor. More formally known as a retainer.
A holder for carrying a water bottle.
The part of a derailer through which the chain passes. The front derailer cage is a simple guide, the rear derailer cage contains the jockey pulley and the tension pulley.
The outer part of a conventional pedal, the part that comes into contact with the rider's shoe.
