Cassette: a gaggle of stacked sprockets or gears to the rear wheel of a bicycle with a rear derailleur. There may be anywhere from five to twelve gears in back on the cassette. Tire: as in frequent use. Normally pneumatic. A tubular tire is glued towards the wheel rim; most https://bikeengines47045.dbblog.net/8279988/what-does-bike-parts-headset-mean