Building on Hope's 30 years of hub manufacturing, the Pro 5 is the combination of all their expertise into a product that meets and exceeds the demands of current and future bike technology. Ebike specific hub designed for the demands of e-bikes. Improved sealing to stop dirt ingress and reduce drag whilst Labyrinth seals have zero drag for incredible freewheel performance. High tensile steel wire cut traps for maximum strength, design to increase longevity, load capacity and a reduction in dragHub shell is machined from 2014 T6 forged aluminum billet, the profile is designed for increased stiffness without adding weight. Increased engagement to 108 with a new 6 pawl freehub design. Fully serviceable and rebuildable with simple tools. End spacers can be easily changed to fit different frame and axle standards. Item Specifics: Bear. Cassette TypeCassette BearingsSRAM XD Cassette Body Type 11/12 SpeedCenter to Flange, Left35Center to Flange, Right22.6ColorBlackDefined Color BlackDesigned for ebikeYesFlange Diameter, Left57Flange Diameter, Right59Hub Drilling32Hub/Brake Compatibility6-Bolt DiscRear Axle0.472in Thru-14Intermediate Spoke Face0.315inJ-BendTooth Count108Weight318