Originally Posted by CdCf
How about using the triple, but use the inner and middle only? That should solve most or all of the chainline issues, and you'd get really low gearings!
I'd need a different bottom bracket to reposition the crank to get a good chainline using the two inner rings. Although, a basic square taper bottom bracket and a 30 tooth inner ring is a pretty cheap combo. I can't remember if there was some reason that I was shying away from doing this. It might be that I may run into issues trying to shift a 42/30 crankset with a standard road double front derailleur. Hmmmm, so many options now appearing...