This bike is an aero [maybe] road bike with slightly steeper seat angles.All three sizes less than 74 deg.I believe this bike is UCI legal and thus has a less aero fork than you might get on a true tri. bike.If I remember correctly Chann McRae rode one at kona with his seat jammed way foward.If you are comfortable on a road bike for time trials it might work.John Cobb says on his web site that last years model set up as a road bike was a great set up.Buy based on a pros fitters recomondation.