Praxis works Practice Conversion Specialised OSBB 61.5 mm 2010-2014 to SRAM GXP/ISIS2.

The Praxis Works Conversion Bottom Bracket is not an adapter, but a complete and high-quality bottom bracket designed to mount Shimano, SRAM GXP, or Campagnolo Ultra Torque cranksets in a BB30, PF30, or Specialized OSBB frame. The patented design places the industrial bearings outside of the bottom bracket, resulting in a stiffer system that does not struggle with frame tolerances like other systems.

Installation is incredibly simple: you press the longer cup on the non-drive side into the frame and then screw on the cup on the drive side. The patented Praxis Collet system expands the Conversion Bottom Bracket to a precisely defined limit and compresses it with even pressure within the frame. There is no way for the bearings to work themselves out of the frame or sit crooked. Additionally, there is a compressible O-ring under the collar of the non-drive side to accommodate width tolerances of the frame.

Thus, the chance of experiencing creaking or other annoying noises in the bottom bracket area while pedaling hard is virtually zero. Together with the high-quality Enduro Bearings, the Praxis Works Bottom Bracket is the best conversion bottom bracket solution.