• What crank? Modern cranks (Hollowtech ii etc.) won't tighten properly if you put in more spacers than they were designed for.
    Did you measure the BB width? Can you find where the rubbing is coming from?

  • It's a Chinese crankset (Magene). It's all tight but I think the chainrings (single spider-mounted unit) are just too narrow and set inwards. I've read some people buying a new set of rings and a spider and fixing the issue but I'd rather spend a few euros to move it out 2-3mm to see if it improves

    Definitely there's a rub due to chain angle when it's in the big ring and small cog and I'm hoping the odd cracking/pinging noise will also be fixed it I can sort the chainline.

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