This is Praxis Works English Threaded/BSA M30 bottom bracket for installing a Praxis M30 Spindle-based crank into a BSA English threaded frame. Praxis Works patent pending design keeps the cartridge bearings outboard of the frame for greater rigidity and free of frame/c-clip tolerance issues that other systems deal with.

*Missing plastic sleeve*

Features:

• Patent Pending Outboard Bearing Design.
• Forged & machined heat-treated 7075 T6 Aluminium.
• 30mm Drive bearing / 28mm Non-Drive bearing.
• 68mm Road version / 73mm MTB version.
• Use M30 BB tool for installation - sold separately