I Weigh 165 but I find that my OX Platinum bike is very stiff in the bottom bracket. I really can feel a difference when I'm out of the saddle compared to an older Lightspeed titanium I used to ride. However, it's still comfortable and soaks up bumps well. It comes in at 19 pounds with a mix of Campy Veloce and Chorus. The tubes are thin, 7/4.5/7 but if I don't beat it, it should last a long time. My guess is that OX Platinum would be a good choice if you drop into the mid 200s but somebody with more experience will have to advise you if you stay around 375.