Rhythm "Big Outboard Bearing" bottom brackets are external mount integrated bottom brackets where the bearings mount outside the bottom bracket shell keeping the cartridge bearings bigger which allow them to spin better. Designed to work with all Rhythm cranks as well as any external bearing type crank set including DXR, Race Face and Saint.
- CNC machined forged aluminum cups
- Shimano/Race Face Compatible
- Includes cups and bearings
- BB Shell Width: 68/73
- Spindle Interface Type: Hollowtech II
- BB Thread Type: English
- Weight: 95 grams