• The crank set I think I MTB. Is a chineseone as it was the only one fulfilling my requirements(40/26T). Shifting looks good and, as much as I measured, I need a 3mm spacer on non drive side and 2mm on the other.

    If of any help the BB is RS500.

  • BB RS500 is a road bottom bracket. It won’t work with mtb cranks regardless of the shell width.

    With Shimano mtb ht2 bottom brackets you run 3 spacers for a 68mm shell, 1 for a 73mm shell so the plastic spacer always matches up.

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