The Salt Plus Trapez Freecoaster Hub offers the ability to switch between freecoaster & cassette using the Trapez Spring Kit (sold separately). Built with an alloy hub shell with a 14mm hollow chromoly axle the Trapez is stronger, more durable & has more features than you'll find in another hub at this price. The Trapez Hub utilises sealed bearings for smoothness & a 9t one piece driver to finish. section Product Specs HUB TYPE: Cassette/ Coaster Switchable AXLE: 14mm Male DRIVER: 9t DRIVE SIDE: Left & Right Switchable SPOKE HOLES: 36h WEIGHT: 571.5g (1.26lbs)