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    Bottom Bracket for M2000 (70x122, BC 1.37x24T)

    Good call on the year - the seller didn't identify the year but looking through the catalogs shows a match to the 92 M2000s. FWIW, the serial number is 51801933828, but most important is your clue that the UN71 and UN51 don't have a flange on the left cup to take up the extra room from a 68...
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    Bottom Bracket for M2000 (70x122, BC 1.37x24T)

    Thanks for the response! Yes, I put a caliper to the shell and it was 70mm. In addition, when I installed the 68mm BB (clearly English with LH thread on the right), with both retainers snugged tight (no gap to the shell), I could see a gap between the inner race and the left cup. Facing 1mm...
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    Bottom Bracket for M2000 (70x122, BC 1.37x24T)

    I acquired my third Cannondale, an M2000 with a Manitou fork, as a frameset and need to build it up. As always, Cannondale's innovativeness means a lot of scrambling. Right now I'm stuck on finding a bottom bracket. It's a 70mm shell and a test fitting of a Shimano 68x122 UN55 with a triple...
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