There is a bearing surface on the spindle, and on each of the cups that thread into the frame. Brake: devices used to stop or slow down a bicycle.The bottom bracket fits inside the bottom bracket shell, which is part of the bicycle frame The bottom bracket may be overhaulable (an adjustable bottom bracket) or not overhaulable (a cartridge bottom bracket). Rim brakes and disc brakes are operated by brake levers, which are mounted on the handlebars. Braze-on: a fitting protruding from a frame to provide attachment, typically for cable housings or tire pumps and similar accessories.īrake shifter or colloquially, brifter (see also Shimano Total Integration, Campagnolo ErgoPower and SRAM Double Tap): combined shifter and brake lever control.Brake lever: a lever for actuating a bicycle brake.Coaster brakes are operated by pedaling backward Band brake is an alternative to rim brakes but can only be installed at the rear wheel.Cable guide: a fitting below the bottom bracket which guides a piece of bare inner bowden cable around a corner.Cable: a metal cable enclosed in part by a metal and plastic housing that is used to connect a control, such as a brake or shifting lever, to the device it activates.Cartridge bearing: a type of bearing that is not user-serviceable, but must be replaced as a unit.