I rarely go over 20 mph on mine (class 3). I try and minimize the pedal assist but it allows me to push myself because I know if I go to far (I'm old and out of shape), I can use the throttle to get home. The only time I was close to that was on a 25 mile ride with my son last summer when it it was in the upper 90's and humid. It was a circle route and the return was into a stiff breeze. The last mile or so was a slog and I used the throttle a lot just to get back.