Wolf Tooth MK0 Bottom Bracket - English BSA 68/73mm For 29mm Spindle Shadow Gray

Wolf Tooth MARKZERO (MK0) Bottom Brackets take performance to another level with aggressive machining custom ceramic bearings and intricately designed race sealing built to their exacting specifications. This design saves you watts while proving durable enough for the most intense off-road racing inclement conditions and are fully serviceable. MK0 components are proudly machined at Wolf Tooth HQ in Minnesota USA.MK0 silicon nitride ceramic bearings feature custom race sealing for flawless performance against the elements and endless speedCustom polymer spindle bushings separate the bearing inner race and crank spindle to eliminate metal-on-metal contact the leading cause of bottom bracket creaksBushings also helps enhance bearing longevity with an interface to the bearing gutter seal for maximum weatherproofingAggressively machined to be lighter than the competition while offering superior speed and performance in all conditions6061-T6 Aluminum cups and AISI 52100 chrome bearing steel races hardened to Rc 60-65 with ACOSUR-ZNA corrosion resistant coating