Shimano Alfine Di2 S705 Internal Hub 11 Speed Disc Brake

Shimano Alfine DI2 S705 Internal Hub 11 speed Disc Brake. Bombproof dependability has gone electronic. Shimano's famed Alfine internally geared rear hubs have been a mainstay of urban bikes and those looking for a bike with plenty of gears to choose from that rarely need servicing. In its latest, and most revolutionary, update to this iconic piece of cycling gear, Shimano has added a few extra gears and made it ready for electronic shifting. The shifting is now easier and faster. This internally geared hub is fully compatible with both Alfine 11 speed Di2 shifters and Di2 road shifters, features a Centerlock disc brake mount, but is also V brake compatible. Note: this is the hub only. It must be built up with a rim and compatible spokes. Shifting requires the MU S705 11 speed motor unit item 50 2764 and optional CS S500 sprocket. If using with Ultegra and Dura Ace Di2, all components require the same firmware version to operate.