I have a hybrid and I've gone up to 30 miles so far and the only downfall I can report is headwind and my ass hurts. The latter can be fixed with a different saddle (I think the consensus is that the Bontrager SSR saddle isn't very comfortable to begin with) The headwind is because of riding position obviously so I just have to deal with it... I'm hoping to crack a 50 miler this weekend or next depending on weather.