• Yup, yes they would.

    Would they work if I threw on a larger chainring? My brain is melting.

    There are other funny variations of it, do not go for anything XX20 which is the ones for 148 rear.

  • Cool. Well, I now have 3 sets of cranks for the Surly and a couple of BB and chainring options. :)

    It says it wants BB-MT801 but is the 501 the same thing just cheaper or do I need a different BB too.

    EDIT: Just looked and I did buy a 73mm MTB BB for the GRX cranks. Maybe I bought them at different times and just wasn't thinking straight at the crank purchase time.

    I presume there's a way I can work out what my chainring size limit will be? ie. approx how wide will the chainring sit + diameter of 38T ring or whatever?

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