LITTLE KNOWN FACTS ABOUT CASSETTE BIKE PART.

Cassette: a bunch of stacked sprockets or gears within the rear wheel of a bicycle with a rear derailleur. There is often anywhere from five to 12 gears in back over a cassette.Straightforward to ASSEMBLE: Notes: The package requires primary hardware techniques & instruments, and it will all over two-3 hours for installation and high-quality tuning