Joined: Dec 2004
Posts: 12,538
Likes: 791
From: Middle of da Mitten
Bikes: Trek 7500, RANS V-Rex, Optima Baron, Velokraft NoCom, M-5 Carbon Highracer, Catrike Speed
It's probably a matter of geometry, and specifically wheelbase. I bet the folder has a *really* short wheelbase. In fairness, it's not designed to go 50 kph; it's designed to stash in the trunk and ride around the campground.