Shimano Ultegra R8170
Top PickWhat We Like
- Smooth, powerful braking with modulation that rivals far pricier options.
- High build quality with easy installation
Worth Noting
- Flat-mount design limits compatibility to road and gravel frames only.
- Type
- Hydraulic disc
- Mount
- Flat mount
- Rating
- 4.8 ★
- Best For
- Road/gravel disc
Read the full review
The BR-R8170 delivers impressive modulation and stopping power, with a clean, well-finished design that installs without fuss. The tradeoff: this is a flat-mount caliper only, so it fits road and gravel bikes – not post-mount mountain frames. For riders with a flat-mount bike seeking hydraulic disc performance, it is a cost-effective path to Ultegra-level braking.
Bottom line: Best suited for road or gravel cyclists with flat-mount frames who want hydraulic disc performance without the full groupset investment.