Wolf Tooth BSA Bottom Brackets are engineered to be smooth, durable, lightweight, fast, and user-serviceable. Our ground-up design features custom bearings, seals, bushings, and cups, which eliminate creaking and balance best-in-class weather sealing with optimized bearing radial compression, alignment, and preload for low drag. They're available for 24mm Shimano, 29mm DUB, and 30mm spindle diameters for maximum compatibility. The bearings in Wolf Tooth Bottom Brackets feature a custom design. The balls and race are made from a hardened chrome bearing steel. This has a higher surface hardness than stainless, which improves the durability of bearing races and reduces spinning resistance and noise. An ACOSUR ZNA coating has also been applied to the race to provide corrosion resistance that is equal to or better than stainless steel after a 500-hour saltwater test. Bearing material paired with an extensive sealing system and the elimination of metal-on-metal contact means Wolf Tooth Bottom Brackets have superior performance in all conditions. Wolf Tooth bottom brackets are machined at Wolf Tooth in Minnesota, USA. KEY FEATURES Compatible with 30 mm spindle diameter cranksets Adjustable-width sleeve fits 68-73mm BB shells Best-in-class sealing protects bearings from water and trail debris. Each BB includes end-cap labyrinth seals, o-ring seals at the crank spindle interface, bearing gutter seals, contact seals on the bearings, and o-rings on the inner shell. Custom polymer spindle bushings prevent creaking and prolong the life of the crankset Standard 46-12 spline tool is used for installation, service, and removal Custom AlSl 52100 chrome bearing steel hardened to Rc 61-66 reduces friction for smooth pedaling with ZNA corrosion-resistant coating Lifetime warranty Replacement parts and service guides available via Wolf Tooth Right to Repair 6061 Aluminium Engineered, machined, and assembled at Wolf Tooth HQ in Minnesota, USA
