Description
Shimano SG-S7051 Alfine 11-speed Di2 disc internal hub gear, 135 mm, 36h, black.
The Alfine 11 speed Di2 specification internal gear hub runs on needle bearings for more durability and high drive efficiency. Helical internal sprockets increase durability, perform better with high torque loading and give a constant engagement for a smooth and quiet operation. Oil bath lubrication system heightens durability and reduces friction in the hub, while Labyrinth seals give better sealing performance both resulting in extending service life. Double roller silent clutch engagement also for a smoother quieter shift. Top normal internal structure for better tolerance when shifting while riding under load. Alfine hubs use pedal power to help down-shifting resulting in fast and accurate shifts with an exceptionally light feel. Shimanos precise manufacturing abilities have enabled them to construct the Alfine internal hub to be their most efficient yet, 409% Gear ratio Centre-Lock disc rotor compatible 135 mm O.L.D. spacing Weight: 1,670g
