Having a few kneee issues, which bizarrely seem to have cleared up since buying a new bike. Now trying to work out what's caused it, apart from n+1 syndrome manifesting itself...
Turns out new bike's cranks are 170mm according to manufacturer. I've always used 175 assuming as i'm a big lad that's what would do the job. 32" inseam and size 9.5 wide if that helps.
Now I know there's a lot more to consider here but does 170mm sound too short for those measurements? I always thought so but now I need to put a new set of cranks on the other bike that's caused the issues i'm wondering whether to try 170mm there too.