I considered getting a fullsize (26" tire) folding bike, ended up getting a 20" wheel bike. Just my 2 cents but I think frame Geometry with regards to comfortability is probably more important on long rides than tire size. That being said their are some nice 26" bikes I would definitely consider. I rode on the Dahon Espresso when I bought by bike and honestly it was very comfortable but just a bit to big folded for my tastes--seriously though, I would consider it and the Jack if you do a lot of riding where the bigger wheels will come into play.