Originally Posted by
BarryII
Maybe. If I do that instead of making a crank shortener then the bike would basically be for my father only and I wouldn't be able to switch back and forth.
I meant making a nut out of a chunk of old crank arm. A little grinding, and you could make a good facsimile of a nut. Or at least something you could grab with vice grips.
But, it is a good point, you could also just use a shorter crankset.