Hello Tom,
Thanks for the great info and specific calculations.
For me it seems that I can win much more speed by improving my CdA than by increasing my power numbers. How did you become so aero? Total weight bike + you = 84kg? What is your length? I am 69kg and 180cm and we ride the same speed in timetrials but I have to produce much more power. I did 3 timetrials last year and with 315 watts I did them with 41.5-43.0km/hour depending of wind and corners. I hope to increase my power to 350watts, my estimated gain would be 63s (28:22 to 27:19) on a 20km timetrial (11.75m/s to 12.20ms, CdA=0.28, Aird=1.226, Crr=0.004, weight=80kg). But you have a CdA of .225 m^2 and .205 m^2 that would be a much better goal for me because with a CdA of 0.225 and my last years poweroutput (315w) I could do a 20km in 26:29. That's sick fast and almost 2 minutes faster than with a CdA of 0.28. I always tought (till today) that those guys were out of my reach...
In august 2008 I want to do 350 watts for 30 minutes and I want to reduce my CdA to 0.26 m^2 (that's 45km/hour | 26:40 for a 20km) do you guys think a 69kg/180cm person can go to 0.23 m^2 (46.8km/hour | 25:40)?
I ride on a small road frame, fsa basebar+bars with zipp 404 + wheelcover, with skinsuit, giro atmos with cover, shoe covers, pro2race rear tire, zipp front tire and latex innertubes, flat back.
Hmmm, informative topic but maybe a very expensive one for me.
Because when I can buy a CdA of 0.23m^2, ooooh :-) :-) when is the P4C coming, hahaha :-) :-)
Thanks for the great info and specific calculations.
For me it seems that I can win much more speed by improving my CdA than by increasing my power numbers. How did you become so aero? Total weight bike + you = 84kg? What is your length? I am 69kg and 180cm and we ride the same speed in timetrials but I have to produce much more power. I did 3 timetrials last year and with 315 watts I did them with 41.5-43.0km/hour depending of wind and corners. I hope to increase my power to 350watts, my estimated gain would be 63s (28:22 to 27:19) on a 20km timetrial (11.75m/s to 12.20ms, CdA=0.28, Aird=1.226, Crr=0.004, weight=80kg). But you have a CdA of .225 m^2 and .205 m^2 that would be a much better goal for me because with a CdA of 0.225 and my last years poweroutput (315w) I could do a 20km in 26:29. That's sick fast and almost 2 minutes faster than with a CdA of 0.28. I always tought (till today) that those guys were out of my reach...
In august 2008 I want to do 350 watts for 30 minutes and I want to reduce my CdA to 0.26 m^2 (that's 45km/hour | 26:40 for a 20km) do you guys think a 69kg/180cm person can go to 0.23 m^2 (46.8km/hour | 25:40)?
I ride on a small road frame, fsa basebar+bars with zipp 404 + wheelcover, with skinsuit, giro atmos with cover, shoe covers, pro2race rear tire, zipp front tire and latex innertubes, flat back.
Hmmm, informative topic but maybe a very expensive one for me.
Because when I can buy a CdA of 0.23m^2, ooooh :-) :-) when is the P4C coming, hahaha :-) :-)