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! Available with standard cartridge sealed bearings and our new Tiramic bearings!
- CNC Durable Forged Aluminum Cups
- Shimano Compatible
- BSA1.37"x24T for MTB, FR, DH to fit 68/73mm Shell
- Available colors: Polish, Black, Red, Gold, Blue, white & Green
- Weight: just 95g (same for either model)
Available now at www.crupibmx.com and soon at better BMX shops. Sold separately or as an upgrade to the Rhythm crank sets.