running it as a 2 chainring greasy finger shifting double will be simple.

thing is duplicating the drop that the Mountain drive IG Crank makes practical

the 2 chainrings are 20/50, or 21/53.. 22/55..

then all 3 ratios are not overlapping, at all.


a 34/54 may be do-able , the speed drive IGC makes that a snap shift , as well ..

but as a "do I need a Low range on this hill till I get to the top, then stop and put the chain on the big ring?"

that hand upshift may work ..