BSD's Back Street Pro Hub was built and designed around BSD's own custom driver that boasts a skip free mechanism and a compact sized shell. The hub shell is made from 6061-T6 alloy that's drilled for 36 spokes paired with a 14mm 4140 heat treated chromoly axle ensuring strength and durability. It also features 14mm female bolts, chromoly cones and hefty 6903 bearings. ###section### Product Specs HUB TYPE: Cassette AXLE: 14mm Male DRIVER: 9t DRIVE SIDE: Right Side Drive SPOKE HOLES: 36h WEIGHT: 484g (1.07lbs) Colour: Black, Raw; Size: RHD