Shimano Ultegra BR-R8170 Flat-Mount Road Disc Caliper Fixing Bolt Description:
The Shimano Ultegra BR-R8170 Flat-Mount Road Disc Caliper Fixing Bolts are designed to attach a flat-mount road bike disc brake caliper to the rear triangle of a bicycle frame. The length is determined by the thickness of the frame, not the actual length of the bolt.
Note: Sold individually.
Features:
- Fixing Bolt C2 attaches rear mounting plate to frame
- See compatibility tab for full list of compatible derailleurs
This product was added to our catalog on February 26, 2026





