Originally Posted by
Duragrouch
That's gonna give you a range of 33.5-73.0 gear inches. 33 is typical for folding bike lows, you can climb with it while standing out of the saddle, but a decent hill, if you like to spin up, you're gonna want close to 20 gear inches. 73 is perhaps just enough high for the flat, barely. My folder, after upgrade, has 21-85 gear inches, I can do hills, and not needing a tour de france fast high gear.
Look up "sheldon brown gear calculator", enter values for a bike you have that has all the gearing you need, and compare. I typically think in gear-inches for results, there is also gain-ratio.
Should the range of gears be good enough for city multi modal riding? I have other bikes with wider range of gears for recreation/touring/commuting.
I just want a simple light trifold that I can quickly fold when traveling by bus/subway in the city. I am car free now and want to get around by public transit. Adding a small trifold to get me to final destinations.