SHIMANO Alfine Di2 SG S7051-11 Internally Geared Rear Disc Hub

Improved internal structure for better gear engagement
Improved performance for both e-bike and non-e-bike usage
New smoother shifting performance
Shimano's "high" driving efficiency rating
Double roller clutch for smooth, quiet shifting
Di2 electronic shift compatible
11 speeds with a 409% gear range
Shimano "top normal" shifting
Center lock disc brake rotor compatible
Oil port for lubrication
Does not include shifter, cog, cog snap-ring, axle nuts, non-turn washers, and cassette joint (Small Parts Kit)
Compatible with Nexus cogs
Rear Hub Spacing: 135mm x 187mm
Rear Axle Type: 10x1 bolt-on
Brake/Compatibility: Centerlock Rotor compatible
Weight: 1,665g.

Original Shimano parts guarantee that all components work perfectly for optimum performance and maximum safety and longevity.