M30 THRU – BB30/PF30 73mm MTB

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  • $128.10

Designed to be a proper BB for installing RACE FACE “CINCH” or Rotor “REX” MTB cranks into 73MM BB30/PF30 mountain frames.  Our patent pending design keeps the Enduro 6806 cartridge bearings outboard of the frame 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 thread the shorter Drive cup 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.