Originally Posted by
Bikejock200M
As an alternative, you could use a Wolf Tooth Roadlink. Tbis as will extend the derailleur mounting point down to clear a larger cog.
Oh yeah, forgot about these newfangled things. That's another option for sure. Suntour ultra freewheel should be findable or makeable. Looks like the current one is 13-21, which is pretty brutal if you're not a racer. Even a 13-28 would provide a much lower gear than a compact 50/34 crank would.