Originally Posted by CliffordK

As far as the bicycle, it is a Pocket Rocket made by Bike Friday here in Eugene, Oregon. Other than the chainring, it is fairly stock from about 20 years ago. They still make the model, but with a few minor updates.

The black suitcase trailer is the standard Pocket Rocket travel trailer. The Samsonite Clamshell has been discontinued, but there is a replacement model that works as good or better. With moderate disassembly the bike fits into the suitcase, and the trailer too.

The cat carrier is adapted from a now discontinued Bike Friday cargo trailer. The cat actually seems to be happier in the bike trailer than in the pickup, even if it is cold.

As far as the chainring, I was doing experiments earlier. The small wheels, of course, spin faster than big wheel bikes and require larger rings. But, this one is on the large size. I'll probably change to a 61T or so sometime, in part due to difficulty mounting the derailleur.

I have a lot of low-end power. I don't watch my cadence a lot, but think I could be happy with 30 to 50 RPM.

I suppose I'm a person that wishes to do the experiments myself. And, while I will turn a larger gear than some people, it has also become obvious that after a point that one may generate more power by downshifting rather than upshifting. I.E. Somewhere around force equal to 50% to 100% of one's weight, one maxes out on the ability to repeatedly push down/pull up, and must increase cadence to increase power, which is the general failure of people wishing to calculate an infinite speed increase based simply on gearing increases.

However, different body configurations could approach the problem differently.