They also cause the piston to return to its off position so the brake pads disengage properly when you release the brake pedal. Thanks for contributing an answer to Bicycles Stack Exchange! The brake must be disassembled further to get these brake shoes out, and these brakes are also more difficult to reassemble. When you squeeze the hydraulic brake levers, a piston pushes hydraulic fluid from the master cylinder into the fluid-filled brake line. When you squeeze the brake lever the length of the cable shortens which squeezes the caliper (in disc brakes). Drum brakes are an old-style type of brake that's rare among vehicles, including e-scooters, cars, and motorcycles. The average cost for a full drum brake replacement (including labor and installation) is around $500. Learn more about Stack Overflow the company, and our products. Servicing is easy: The wheel cylinder of a drum brake is easier to service than the brake calliper on a disc brake. [Shimano has introduced improved Rollerbrakes since Sheldon first gave this advice; still, the demand on a front brake is greater than on a rear brake, and there is an issue with fork-blade loading, as with any front hub brake. Thanks go to Henry Cutler of Workcycles in Amsterdam for the photo below which shows the internals of a Rollerbrake -- from the middle outwards, the cam, six rollers (partially hidden under the retainer which positions them), three brake shoes and half of the external shell. It's an auxiliary brake usually fitted to tandems so they can overheat that using it as a drag brake, knowing that they still have both proper brakes available and working. but then you must replace the shoulder locknut with a nut which has a larger surface to press against the dropout. It was dangerous because the front V-brake had been broken. the weight difference varies alot. Brake drums are usually sold individually, in a 2-wheel set, or as part of a kit. 1.