How many of you guys do long distance trips on folders, and what kind of bikes do you do it on? (50+ mile day trips, centuries, brevets, weekend tours, etc).

My brother-in-law rides a century once a year. He said his last century (in a larger group where they could draft) averaged about 17mph. I'm doing my first 30+ mile trip this weekend on a fairly modified Downtube 9FS. Later this year I want to try my first century, and a couple of overnight trips (with stays at a campground in the middle).

Somewhere in the back of my mind I keep thinking maybe I'll want a larger wheeled road bike to do this kind of riding, but I can't help but wonder if that's because it's "conventional wisdom" handed to me since birth, or if there are really technical reasons why my bike wouldn't be as good for this kind of riding.

At any rate, a new bike isn't in my budget and I have no plans on getting rid of the 9FS, so I guess I'll see first hand this weekend how it handles on longer rides. I'm just curious to see what others are doing on theirs.