Wolf Tooth Bottom Bracket - T47 Inboard 85.5/92mm For 29mm Spindle Raw SilverCustom engineered by Wolf Tooth to be durable, reliable, lightweight, and smooth Weather sealing was a main focus with o ring seals on the spindle and inner shell, a wiper connection seal between the bearing and the end cap, bearing race seals, and labyrinth end cap design To prevent creaking, spindle bushings separate the bearing inner race and crank spindle to eliminate metal on metal contact Custom chrome bearings are hardened for durability and