Designed to be a proper BB for installing SRAM GXP/ISIS2 steel spindle cranks in either BB30 or PF30 mountain frames. This includes cranks from SRAM/TRUVATIV/QUARQ, and Oval Concepts. Our patent pending design keeps the cartridge bearings outboard of the frame right on SRAM 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.
For SRAM™/Truvativ™/Quarq GXP™/ISIS2STEEL Spindle, also Oval Concepts 400 series MTN cranks
Designed precisely to SRAM bearing stance & chain line spec
Forged & machined heat-treated 7075 T6 Aluminum
Enduro 2437 Drive /2237 Non-Drive steel bearings
For 73mm BB30 or PF30 mountain frames
Not for BBRight,BB386EVO, BB86, BB92 frames
68mm version cannot be used for MTB Cranks
MTB Guides: ISCG05 - Good, ST Mounted - Good, ISCG03 - Not Good
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