Internal parts for Shimano Internally Geared & Dynamo Hubs. The driver unit connects the Alfine cog to the internal gear cluster. This driver is designed for Shimano SG-700 hubs only.
- Original Shimano replacement parts
- For Alfine SG-S700 hubs
- Shimano part # Y37R98080
The Shimano SG-S700 tech document can be found
here