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. * FOR 73MM 30MM RACE FACE “CINCH” OR 30MM ROTOR “REX1” MTB CRANKS ONLY. * 30MM DRIVE & 30MM NONDRIVE | 6806 Steel bearings * For install in 73mm MTB BB30 and PF30 MTB frames * Forged & machined heat-treated AL Cups * VIP – The Praxis M30 BB tools are needed for installation. [http://www.praxiscycles.com/product/m30-tool/] * MTB Guides -ISCG05 & ST Mounted Good, ISCG03 Not Good TECHNOLOGY: * Patent Pending Design * “Collet” style non-drive cup expansion for wiggle-free press * Non-Drive O-Ring compensates for frame width discrepancies
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On all orders over $99
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