Salt Plus' Vertex Freecoaster Hub boasts a long lasting, smooth clutch style mechanism with a larger slack setting & unique 3 point engagement system for easier crankflips. The hub shell is built from 6061 alloy & paired with a 14mm chromoly hollow axle & features sealed bearings throughout, the slack can be adjusted & comes with washers. It also features a Slatplus Pro nylon non-drive side hub guard. section Product Specs HUB TYPE: Freecoaster AXLE: 14mm Male DRIVER: 9t DRIVE SIDE: Right Side Drive SPOKE HOLES: 36h WEIGHT: 671g (1.48lbs)