- NEW Shimano XTR MTB BB-UN91 Italian-Thread cartridge sealed bearing bottom bracket, in original box.
- Square taper axle.
- Italian threads, fits 70mm bb shells, triple MTB cranks and has a 113mm axle.
- Complete and ready to use.
- Made in Japan quality from 1993.
- 8.5oz./243 grams.
- BB574.
- FREE shipping in the USA.