M30–BB30/PF30 73mm MTB

  • Sale
  • $128.10


  • For Praxis M30 Spindle based cranks only.  Not for other 30mm cranks.
  • 73mm MTB Version
  • Forged & machined heat-treated AL Cups
  • 30mm Drive/28mm NonDrive | Steel bearings
  • For BB30 and PF30 MTB frames
  • 68mm cannot be used for MTB Cranks
  • Use M30 BB tool for installation
  • MTB Guides -ISCG05 & ST Mounted Good, ISCG03 Not Good
  • FRAME GUIDE HERE INSTRUCTIONS HERE
  • Bearing FAQ HERE
  • Warranty

Designed to be a proper BB for installing Praxis M30 spindle based cranks in either BB30, PF30 mountain frame. Our patent pending design keeps the cartridge bearings outboard of the frame right on Shimano™ spec for greater rigidity and free of frame/c-clip tolerance issues that other systems deal with.

Simply press in the longer non-drive-cup, then the shorter drive cup threads into it. As the drive cup threads in, our trademark Collet system expands to a precise limit evenly dispersing pressure for a super tight fit. With both cups connected and our collet set exactly to spec, there is no chance the bearings can come out of alignment or wiggle/walk out of the frame. This design also uses a compressible o-ring on the non-drive side cup to compensate for frame shell width discrepancies.