- Components
- Electronic Shifting
- Shimano D12
- shimano alfine sg-s7051 di2 8-speed 36h internal gear hub
- The alfine 8 speed Di2 specification internal gear hub runs on needle bearings for increased durability and high drive efficiency.Features:Top normal internal structure for improved tolerance when shifting while riding under loadLabyrinth seals improve sealing performance extending service lifeAlfine hubs use pedal power to aid down-shifting resulting in fast and accurate shifts with an exceptionally light feelDouble roller clutch engagement also gives a smoother quieter shiftShimano'S precise manufacturing abilities have enabled them to construct the alfine internal hub to be there most efficient yetCentre-lock disc rotor compatible135 mm o.L.D. Spacing