What kind of speeds do you see going up a hill? I usually pull about 17mph going over the average American freeway overpass, but there's a killer hill about seven miles from my apartment where I slow to 10-12 for about two miles while I'm climbing; then, I zing down the other side at about 40mph. I probably could go faster if I had bigger gears (I'm spinning loose when I hit 40 on my roadie), and I'd feel better if the road didn't have huge potholes in it.