Shimano Alfine Di2 SG-S7051-8 gear hub 8 speed disc center lock

With the Alfine Di2, Shimano has expanded its premium electronic shifting system to the urban sector. The system allows for effortless gear changes at the push of a button. A small, separately available actuator motor at the hub is controlled by the shifter and initiates the shifting process immediately. The electrical energy for this is supplied by the Di2 battery, which is available in various designs.

The Inter-8 hub has increased the overall gear ratio range to 307%. In comparison, the Inter-7 has a value of 244%. Additionally, the gears of the Inter-8 are spaced closer together, allowing for a more comfortable and efficient cadence.

• Weight: 1670 g
• Details:

• Bolt circle diameter: 92.6 mm
• Flange distance: 57.3 mm
• Flange diameter: 104.3 mm
• Axle length: 187 mm
• Recommended chains: CN-HG93, CN-HG53, CN-HG50
• Recommended cogs: CS-S500, SM-GEAR

• Application area: City / trekking bike
• Design: Rear wheel
• Cassette compatibility: 8-speed rear hub
• Shifting compatibility: Hub gear
• Material: Aluminum
• Axle diameter: 10 mm
• Installation width: 135 mm
• Sealed bearings
• Brake type: Disc brake Center Lock
• Axle: Screw axle.