The Shimano Alfine SG-S7001 is an 8-speed internally geared rear hub built for riders who want clean, low-maintenance drivetrain performance with disc brake compatibility. Covering a 307% total gear range, it delivers smooth, quiet shifts whether you're commuting, touring, or tackling varied terrain — with no exposed derailleur to worry about.

Highlights

• 307% gear range: Versatile spread across 8 internal speeds for confident riding on climbs and flats alike.
• Centre Lock brake mount: Compatible with Shimano's Centre Lock rotor system for fast, secure rotor installation and removal.
• Double pinch roller technology: Engineered for softer, low-noise gear changes, even under load.
• Double-grinding seal: Keeps dirt and moisture out of the internals, extending service life with less maintenance.
• Cup-and-cone bearings with needle bearing in gearbox: Delivers smooth rolling and long-term durability.
• Internal gearing: All moving parts enclosed within the shell — protected from mud, rain, and impact.

Precision Shifting, Minimal Maintenance

The SG-S7001's internal gear mechanism keeps all shifting components sealed away from the elements. The double pinch roller design ensures predictable engagement with each gear change, while the integrated needle bearings in the gearbox reduce friction and wear over thousands of kilometres. The result is a drivetrain that performs consistently and demands far less attention than a conventional cassette-and-derailleur setup.

Built for Disc Brake Bikes

The Centre Lock disc mount integrates neatly with Shimano's rotor ecosystem. A spline-mount interface secured by a standard lock ring makes rotor swaps straightforward, and the system is compatible with the broad range of Shimano Centre Lock rotors. This makes the SG-S7001 an ideal hub for commuter, touring, and urban builds where all-weather stopping power is a priority.

Compatibility & Fit

The SG-S7001 is an 8-speed internal gear hub requiring a compatible Shimano Alfine or Nexus 8-speed shifter and shift cable. It features a 135mm O.L.D. (over locknut distance) with a 187mm axle length, suited to standard 135mm rear dropouts. This version is laced 32-hole and is finished in black. Brake compatibility: Centre Lock disc rotors only — not compatible with rim brakes or 6-bolt rotors without an adapter.