Thanks for your recommendation. I got the Big Apples, and they deliver a really plush ride. The bike, already stable for a folder, is now incredibly so. Suspension? Fuhgeddaboudit.

The Big Apples have the reflective stripe on the sidewall. I thought I saw some Big Apples on a full-size bike that did not have the reflective stripe, so this was a nice surprise.

While I was at it, I made another great upgrade -- 2 Salsa seatpost QRs. Expensive ($25/each), but worth it, IMO.