Wolf Tooth MKØ BSA Bottom Bracket The Wolf Tooth MKØ Bottom Bracket redefines the expectations of ceramic performance by merging incredible speed with the rugged durability required for elite off-road racing. Unlike traditional ceramic bearings that often fail in harsh conditions, the MKØ utilizes custom race sealing and premium low-drag ceramic bearings built to exacting specifications to save you precious watts without sacrificing longevity. By eliminating the typical trade-off between friction and protection, this bottom bracket thrives in inclement weather while providing the smooth, effortless rotation usually reserved for dry-weather race days. Engineered to silence the common frustrations of modern drivetrains, the MKØ features custom polymer spindle bushings that eliminate metal-on-metal contact, effectively ending the cycle of annoying bottom bracket creaks. These bushings also serve as an additional line of defense, interfacing with the gutter seals to provide best-in-class weatherproofing against mud and debris. Fully serviceable and compatible with 24mm, 29mm DUB, and 30mm spindles, each unit is proudly designed, machined, and assembled at Wolf Tooth HQ in Minnesota. This is a no-compromise component for the cyclist who demands a silent, high-efficiency interface that is built to endure the most intense racing seasons.