The BSD Revolution Hub is a next-generation Planetary freecoaster, it's a hub that feels like a cassette hub, weighs the same as a cassette hub, has a pedal gap like a cassette hub and sounds like a cassette hub. Sounds like a dream huh? Well now it’s a reality with the BSD Revolution v1.5 Hub with the new upgraded v1.5 spring loaded clutch. *This is the new female axle version of the hub* At the core of the system is the Planetary Clutch Mechanism, a compact, innovative clutch that replaces the traditional heavy cone-style clutch with a lightweight assembly. This advanced mechanism enables immediate pedal engagement with virtually zero pedal gap, while eliminating unwanted engagement during fakie manoeuvres. Utilizing the Planetary clutch system that functions in a unique and revolutionary way, the BSD Revolution hub eliminates many of the problems associated with the heavyweight traditional cone style clutch design. Features: 30% lighter than conventional freecoaster hubs. No gap when pedalling forward. Eradicates unwanted engagement on rollbacks. Feels and sounds like a cassette hub. No need for oversized hub bearings due to low axial load. Supertough hollow male 14mm chromo axle. Includes BSD-specific hubguards for optimal grind protection Dimensions for spokes: Drive side Flange diameter 67mm Spoke hole pitch circle diameter 58mm Non drive side Flange diameter 54mm Spoke hole pitch circle diameter 45mm Center to flange 26mm Colour: Polished, Black