Shimano

Alfine SG-S505 Di2 8-Speed Internal Geared Disc Brake Rear Hub

The Shimano Alfine 8-Speed Di2 disc brake hub carries Shimano's highest efficiency rating for internally geared hubs. Now you can enjoy the quiet and clean experience of an internally geared hub with the effortless shifting of Di2 electronic shifting. This hub is compatible with Nexus cogs, and uses a silent double roller clutch for smooth quiet shifting, even when stopped. In a sharp piano black finish, this hub is compatible with Alfine Di2 flat and drop bar shifters.

• Alfine SG-505 Di2 Disc Brake hub, 32 hole, centerlock rotor compatible
• 135mm rear mountain bike spacing, 10x1 bolt on axle
• Does not include Di2/E-tube components, motor unit, rotor, cog, cog snap-ring, axle nuts, non-tun washers
• 8 speeds with a 307% gear range
• Alfine 8-speed hub gear range: 1st gear = 0.527, 2nd gear = 0.644, 3rd gear = 0.748, 4th gear = 0.851, 5th gear = 1.00 (direct drive), 6th gear = 1.223, 7th gear = 1.419, 8th gear = 1.615