As I said in your other thread about tri bikes, *position* is the most important factor determining aerodynamics. It's significantly more important than equipment. Funny, your post here is like you never even read my response, or perhaps you didn't understand it or fully absorb it.

The guy is faster than you because he's more aero. His equipment matters but his position matters most. It's not just a matter of you going out and buying more aero equipment, it's a matter of being able to ride it in the most effective position.

As to the comment about speed being a matter on power to weight ratio, on a flat TT course this is not correct. It's power to CdA ratio.

I also frequently read here on BF that you lose power in an aero position. Not necessarily true. It takes a lot of adaptation, time riding threshold efforts in position, but the goal is to not have any difference between your power on the road & TT bikes. Not a pipe dream, it's just a lot of work that many people don't want to put in.

That said, if you race TTs and can get yourself into some kind of very fast aero position, something that is substantially faster but you couldn't put out the same power as the road bike- well then screw the power, a race is a contest of speed not power.

The other thing to recognize is that riding perfectly, managing your effort relative to wind, undulations in road, etc, is hugely important. All other things being equal, i.e. two people racing with identical power to CdA, the person who races perfect splits can be surprisingly faster, it could be as much as 15-30 seconds on a 20k TT, just by parcelling your effort out perfectly.