I’ve got an SLX triple converted to double and bash on my Soul. I run it with a BB mounted Blackspire Stinger, 36-22 over 11-34. On a couple of occasions recently I’ve found myself trying to pedal it small-small and suffering a chain jammed between the ring and the chainstay. Obviously chainline is fine all across the cassette in the big ring, which is in the middle ring position, but the granny is still where it would be on a triple.
Logic states if I were to spacer the BB (73mm) then the chainline may be improved enough for the jamming to stop.
1) Is this right, will it help?
2) will it cause axle/crank problems on the non-drive side?
3) If it will work, do I put the spacer inboard or outboard of the Stinger?
4) Must I always remember to swap to the big ring once I’m getting onto the smaller cogs?
or
5) Am I barking up the wrong tree and ought to be looking elsewhere for the cause of the jamming (brand new granny and chain, so chainsuck is unlikely cause) ?