• Can i fit a 73mm chainset into a 68mm shell using the spacers supplied with the bb (hollowtech)?

  • A 73mm chain set or a 73mm bottom bracket?

    If the latter, I don’t think so. If the former, if the rings don’t hit the chainstay you can possibly make it work. Not sure if it will impact BB bearing life.

  • Hollowtech stuff like that is 68/73, for a 68mm shell you use 5mm of spacers DS and 2.5mm NDS (used to all be 2.5mm spacers but one of those is split into a really thin one and a less thin one now). That effectively makes it a 73mm shell and the crankset is for both.

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