The Back Street Pro is BSD's new street ready hub. BSD have designed the Back Street Pro around their own custom driver with skip free mechanism while still maintaining a compact sized shell. With features such as bombproof 14mm female bolts, chromo cones, a massive female axle & hefty 6903 bearings, you know this hub is built street tough section Product Specs HUB TYPE: Cassette AXLE: Female Bolts DRIVER: 9t SPOKE HOLES: 36h WEIGHT: 464g / 16.3oz