I usually run 46 X 16 on my cruisers which equates to about 76 g.i. with big fat 2.35" balloon tires. That's good for maintaining ~20mph at a cadence of ~90rpm yet is decent enough to climb hills in my area.
Originally Posted by
fietsbob
...You might search for an adapter that lets you Mount a 5 bolt chainring...
SunLite should still sell those. I've had one in my parts bin for over a decade... no idea why I even have it.
https://www.amazon.com/Sunlite-BB-Co.../dp/B00TU4NYOQ