Cassettes / Rear Stars
A bicycle cassette is an important structure that consists of a set of stars of varying numbers. They can differ not only in the number of stars, but also for different types of bicycles. A set of stars serves to regulate the load and speed, by moving the chain along the stars, the gear ratio between the system star and the cassette changes. Sometimes freestyle (ratchets) are referred to as cassettes, but the cassette is attached to the bushing drum. The ratchet mechanism is located in the drum itself. If you are going to buy a cassette for a bicycle, please note that in addition to a different number of sprockets, the sprockets can have a different number of teeth, the transmission capabilities can be changed by choosing bicycle cassettes with a different set of sprockets. Shimano, Sram, Sunrace are the most famous manufacturers, they modify bicycle cassettes and improve their quality every year. Cycling is now on a trend towards more stars in cassettes. But the most common ones today are seven-point, eight-point and nine-point cassettes, although often ten or even eleven stars can be found on bicycles.