Shimano Alfine SG-S7051 Di2 11-speed Internal Hub Gear Disc Brake

Shimano Alfine SG-S7051 Di2 11-speed Internal Hub Gear Disc Brake

Shimano Alfine SG-S7051 Di2 11-speed internal hub with Centre-Lock disc brake, offering precise electronic shifting, smooth quiet operation, and durable performance for E-Bike and non-E-Bike urban, commuter, and touring bicycles.

Features & Benefits:

• Alfine 11-speed Di2 internal hub delivering a wide 409% gear range for versatile riding.

• Needle bearing construction increases durability and high drive efficiency.

• Helical internal sprockets improve torque handling and provide constant, quiet engagement.

• Oil bath lubrication with labyrinth seals reduces friction and extends hub lifespan.

• Double roller silent clutch engagement enables smooth, quiet, and precise shifts.

• Pedal-assisted downshifting for fast, accurate shifts with minimal effort.

• Shimano Di2 electronic shifting integration for fully automatic, responsive gear changes.

• Centre-Lock disc rotor compatible with 135 mm O.L.D. spacing.

The Shimano Alfine SG-S7051 Di2 11-speed internal hub is designed for E-Bike and non-E-Bike applications, providing a wide 409% gear range and full electronic shifting precision via Shimano Di2. Its needle bearings, helical internal sprockets, and oil-bath lubrication ensure smooth, quiet, and durable operation under high torque loads. Labyrinth seals protect against water and dirt, while the double roller silent clutch ensures effortless, accurate downshifting. Perfectly suited for urban commuting, touring, and cargo bikes, this hub is compatible with Centre-Lock disc rotors and frames with 135 mm O.L.D., combining reliability, efficiency, and low-maintenance performance.

Technical Specifications:

• Speed: 11-speed

• Brake type: Disc brake

• Disc rotor interface: Centre Lock

• Series: Alfine

• Model number: SG-S7051-11

• Shifting structure: Shimano Di2

• Gear ratio (total): 409%
  1 – 0.527
  2 – 0.681
  3 – 0.77
  4 – 0.878
  5 – 0.995
  6 – 1.134
  7 – 1.292
  8 – 1.462
  9 – 1.667
  10 – 1.888
  11 – 2.153

• Hub width (O.L.D): 135mm

• Spoke holes: 32H or 36H

• Flange distance: 57.3mm

• Flange diameter: 104.3mm

• Offset: 3.15mm

• P.C.D. left / right (mm): 92.6

• Weight: 1665g

• Colour: Black

Compatibility Notes:

Designed for both E-Bike and non-E-Bike use
Fully integrated Shimano Di2 electronic shifting
Centre-Lock disc rotor compatible
Fits frames with 135 mm O.L.D. spacing