68x123mm Square Taper Bottom Bracket Upgrade For 68mm Shell And 123mm Spindle Length Easy Swap For BB UN26 And Shimano Tourney TX800 Series Mountain Bike Cranksets Smooth Power Transfer And Reliable Performance
✔️ 68x123mm square taper BB, single unit with steel bearings
This bottom bracket is a 68x123mm square-taper cartridge designed for bikes with a 68mm shell width and 123mm spindle length. It’s a handy upgrade for square-taper cranksets on mountain bikes, finished in black for a clean, low-profile look.
✅ 68x123mm size fits 68mm shell and 123mm spindle
✅ Square taper interface compatible with square-taper cranks
✅ Replacement for BB-UN26 style 68x123mm bottom brackets
✅ Steel bearing cartridge design for smooth rotation
✅ Includes 1 bottom bracket per package
💡 What is a bottom bracket for square-taper cranksets used for?
That connects the crank to the frame and supports smooth rotation under pedaling.
- square-taper compatibility for secure engagement
- 68mm shell width and 123mm spindle length compatibility
- cartridge bearing design for smooth rotation and longer life
- replacement option for BB-UN26 type cartridges