Cassette: a bunch of stacked sprockets or gears to the rear wheel of a bicycle with a rear derailleur. There can be anywhere from five to 12 gears in again on a cassette. Rim brakes employ pads that grip the wheel rims, even though disc brakes use rotors and calipers https://bike-engine-comparison84836.bloggerchest.com/34905876/the-basic-principles-of-party-bike-belfast