Shimano Sora rear hub Specifications: Colour: black Material housing: aluminium Material axle: steel Type of bike: road bike Braking system: rim brake Number of spoke holes: 32 Number of gears: 8/9/10 speed Flange diameter: 53,8 mm Flange distance: 57,9 mm Axle length: 135 mm Shaft type: quick release 168 mm Group: Sora RS300