• Shimano UN 55

    Cheers John... just to double-check, am I looking for a 68mm / 110mm?
    Do they work for triples as well as doubles, as long as the chainset manufacturer says 110mm?

  • I'm guessing the frame has a 68mm bb shell? Then yes a 68/110 will work, the length of the axle goes with the q factor of the cranks, so low q factor usually requires longer bb axle length, if the chainset manufacturer recommends 110mm then go with that, Spa Cycles has em for £24, buy a couple, I think Shimano have stopped making them.

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