The seat tube angle of a road bike is 71-73 degrees. Correct? Ok so if i put some tribars aero bars on a standard road bike will the seat tube angle be too far back should it be around 78 degrees? so you are not perched on the tip of the saddle. I understand the seat tube angle on triathlon bikes and time trial bikes is around 78 degrees. So if i was to spend around £100 English pounds on aero bars would it be worth it or is the geometry all wrong because it is a road bike.