So I got a set of WI ENO cranks, 175, and went to put them on a Mtn. Cycle Rumble S1. The cranks arms hardly have any clearance by the rear triangle with an average width bb. A wide bb puts the chainline way to the outside, barely workable. The main problem seems to be the width of the rear triangle tubing. Two things.

Doesn't seem like the crank arms have much offset compared to others?

What about a spacer that would push the ring closer to the frame? Don't know if there are enough threads for that though.