Praxis Works M30 Bottom Brackets Description: The Praxis M30 Bottom Brackets are constructed from high-quality steel and are a press-fit design for frame bottom bracket diameters of 41mm. Only compatible with the Praxis M30 alloy spindle cranksets. Features: Praxis M30 crank spindle specific 30mm drive bearing/28mm non-drive bearing For use with Zayante Carbon, Zayante Carbon-S, Zayante alloy, Alba, Girder and Cadet cranks Made with Enduro bearings and high grade grease Multiple dust cover widths for an exact fit Specifications: Frame Interface: BB86/90/92 Spindle Interface: Praxis M30/28 Bottom Bracket Shell ID: 41mm Shell Width: 86.5/89.5/91.5mm Color: Black