Shimano Alfine Di2 SG-S7051-11 Center Lock Disc Internally Geared Hub

Alfine Di2 SG-S7051-11 Internally Geared Hub by Shimano - quiet and highly efficient

With the Shimano Alfine Di2 SG-S7051-11 internally geared hub you can shift 11 gears electronically. It convinces with maximum efficiency (range over 400%) and silent operation. The SG-S7051-11 internally geared hub is designed for use on touring, city and e-bikes with Center Lock disc brakes. A shift servo and a power modulator facilitate operation.

Guidelines for Replacing E-bike Components:

Before you replace components on your e-bike, please read through the guidelines for component replacement for CE-marked e-bikes/pedelecs with pedal assistance.

Specifications:

Series:

Alfine Di2 S7050

Application:

City & Touring

Gears:

11-speed

Brake Type:

Center Lock Disc

Axle Type:

10 mm bolt-on axle

Over Locknut Dimension:

135 mm

Spoke Hole Count:

32 hole, 36 hole

Technical Information:

Range:

409 %

Material:

Aluminium

Technology:

Inter-11

Axle Length:

187 mm

Spoke Size:

13 gauge (2.3 mm) / 14 gauge (2.0 mm)

Pitch Circle Diameter:

92.6 mm

Flange Diameter:

104.3 mm

Flange Width:

3.2 mm right, 3.2 mm left

Flange Distance:

57.3 mm

Offset:

3.15 mm

Compatibility:

Small Parts Set:

SM-S705

Motor Unit:

MU-UR500 (with cable EW-SD50), MU-UR510 (with cable EW-SD300)

Chain Tensioner (for vertical dropouts):

CT-S500, CT-S510

Sprocket:

CS-S500, SM-GEAR

Crank:

FC-S501

Chain:

CN-HG93, CN-HG71

E-Bike:

EP8 EP801, EP8 EP800 for Urban / Touring, EP6 for Urban / Touring, STEPS E6100, E6180, E5000, E5080

Features:

• for Di2 shifting
• optimised inner construction for better gear changes
• better performance on e-bikes and conventional bicycles
• silent freehub
• shift servo
• shift power modulator
• high efficiency
• anodised

Technology:

Inter-11
11-speed gear hubs from Shimano with Inter-11 technology are designed for disc brakes. They feature helical gearing for a smooth and comfortable ride. The roller clutch enables low-noise operation. The needle bearing delivers high drive efficiency as well as durability and is very easy to maintain. Inter-11 gear hubs are characterised by a wide gear ratio range, which makes them suitable for different types of terrain.

Gear Change Support
Gear Change Support is a shift servo technology on Shimano gear hubs. It ensures that you can downshift quickly, precisely and without using a lot of force, as it uses part of the pedal force for this process. The pedal force acts against the shift cylinder to overcome its counterpressure and execute the gear change. The shifting force is thus reduced by 40 %.

Manufacturer Numbers:

black 32 hole:

I-SGS705111BL

sliver 32 hole:

I-SGS705111BS

black 36 hole:

I-SGS705111AL

sliver 36 hole:

I-SGS705111AS

Contents:

• 1 x Shimano Alfine Di2 SG-S7051-11 internally geared hub
• 1 x Shimano Center Lock cover