NOS Shimano XT/Ultegra BB-UN71 Square Taper Bottom Bracket: 122 x 68mm English (Take Off)
Like running square taper cranks, but tired of the bottom bracket weight? This XT/Ultegra BB is nearly 100g lighter than the standard UN-52! Sealed bearings, hollow spindle, buttery smooth.
The 122mm spindle is great for many triple cranks.
New old stock, take off.
- Spindle length: 122mm
- Shell: 68mm
- Threads: English
- Square taper JIS