Originally Posted by
guadzilla
I have read it takes approx 290-300W to hold 25mph on a road bike in the drops and approx 250-260W in a TT tuck. Want to try to figure out what actual numbers are for various people.
Those are probably pretty close for someone fit. I'm 6'2" 205lbs. My last TT was flat and had a 3-5mph wind blowing. I did 23.9mph that needed 261 watts avg. That included a wheel cover, 404 front and most all the other aero stuff except for a TT frame. I used the Supersix instead. Now that I have a TT frameset and hopefully more fit I'd like to see that speed increase for the same watts or the same speed with less watts.
Generally with size comes power at the price of climbing ease. So flats and descents are my friend. Climbing I'll get passed by damn near everyone. Just got to ride your strengths and hold on when you're in a situation that doesn't favor your style.
I'll let the experts fill in the details on weight and aerodynamic drag. I just try to lessen both.