Shimano Shimano Alfine SG-S7051 11-Speed Di2 Disc Internal Hub Gear, 135 mm, 32h, Black

Information

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