Wolf Tooth Bottom Bracket - English (BSA) 68/73mm For 24mm Spindle Orange MPFN-MOP30009 136mm wide spindle: 52mm chainline

136mm wide spindle: 52mm chainline on bikes with Boost 148mm rear spacing (optional: use Shimano 12sp ring for 55mm chainline with 136mm spindle)

The Ultegra RX Rear Derailleur brings Shimanos chain stabilizing technology road cycling drivetrains delivering smooth and precise shifting over technical terrain

Low-profile

Color Black Over Locknut (mm) 142/148 Thread Pitch 1

Color Black/Reflective Defined Color Black Flat Protection Tread ISO Diameter 559 / 26" MTN ISO Width (mm) 56 Labeled Size 26 x 2

Wolf Tooth Bottom Bracket - English (BSA) 68/73mm For 24mm Spindle Orange MPFN-MOP30009 136mm wide spindle: 52mm chainlineWolf Tooth Bottom Bracket English (BSA) 68 73mm For 24mm Spindle Orange. Wolf Tooth English (BSA) bottom brackets are engineered to be durable reliable lightweight and smooth. The weather sealing is best in class with o ring seals on the spindle and inner shell a wiper connection seal between the bearing and end cap bearing race seals and a labyrinth end cap design. To prevent creaking spindle bushings separate the bearing inner race and crank spindle