I have accomplished this feat once also. It was exactly 38.0 - granted it was on "a trip down off the mountain" (about an hour and a half), but it wasn't all downhill! I got about 27.5 coming back, so that still averages about 32.75 for that particular trip. One the whole I'm averaging about 28 even when I'm not trying. Now if I could just get this tire thing figured out. <_<