Praxis M30 Bottom Bracket

The M30 system uses a unique stepped spindle design, featuring a 30mm drive side and a 28mm non-drive side. This specific architecture allows for a robust, stiff connection that improves power transfer while maintaining a wide bearing stance for better stability.

Praxis offers the M30 in a wide range of configurations, including BSA, BB86/90/92, BB30, PF30, BB386 EVO, BBRight, and various T47 standards. You should verify your frame's bottom bracket shell width and type before purchasing to ensure compatibility.

Yes, because of the specific bearing sizes and the M30 spindle design, you will need a dedicated Praxis M30 bottom bracket tool to install it correctly without damaging the bearings or cups.

The M30 bottom bracket uses proprietary bearing sizes (30mm drive / 28mm non-drive) rather than standard off-the-shelf sizes. While Praxis offers both steel and ceramic options, you will need to source replacements directly from Praxis or an authorized dealer.

By moving the bearings further outward, the wide stance design increases the support for the crank spindle. This reduces flex under heavy load, resulting in a more stable, efficient pedaling feel, especially when climbing or sprinting.

No, the M30 bottom bracket is specifically engineered for Praxis M30 cranks. It will not work with standard 30mm spindles because the non-drive side bearing is sized at 28mm to match the stepped spindle design.