I just found this forum and thought I would contribute. Many of you wonder how much power it takes to ride at certain speeds. Of course the natural disclaimer is that it is impossible to tell because of differing frontal areas, equipment choice, course profile, weather conditions, etc. But I thought I would share my info anyway.
Last Sunday was the Oregon State TT Championships. The course was a flat, fast, accurate, out and back, 40k. There was blue sky, temp in the 70's. However, there was a wind out of the north on this north/south course. So, you had a tailwind out/headwind back situation.
I am 6'0" and 171 lbs and 38 years old. My bike is an old Softride Power V, Visiontech bars, an old 8 spoke Spinergy in front, disc in the rear, skinsuit and aero helmet. Basically, a pretty aero setup. FWIW, if you go to Analytic Cycling, I have determined from my database of rides that I have a frontal area of .60.
I decided to ride conservative going out so that I had enough power coming back against the wind. I hit the 20k turnaround in about 26:40 or 27.9mph. Coming back, I put more effort into it and had a split of about 30:30 or 24.4mph. Total time was 57:15 or 26.0 mph.
Without the wind I would have been deep into the 56's. I wasn't able to ride with my Powertap, but referring to my extensive database of TT's, I would of averaged right at 350 watts. I also have a max HR of about 182 and I averaged 166 for the TT or 91% of max. If I would have gone out harder, I would have averaged 167-168 or about 92%. So, I was slightly into the anaerobic range or, put another way, I was just above my anaerobic threshold. Hope this helps, Kevin
Last Sunday was the Oregon State TT Championships. The course was a flat, fast, accurate, out and back, 40k. There was blue sky, temp in the 70's. However, there was a wind out of the north on this north/south course. So, you had a tailwind out/headwind back situation.
I am 6'0" and 171 lbs and 38 years old. My bike is an old Softride Power V, Visiontech bars, an old 8 spoke Spinergy in front, disc in the rear, skinsuit and aero helmet. Basically, a pretty aero setup. FWIW, if you go to Analytic Cycling, I have determined from my database of rides that I have a frontal area of .60.
I decided to ride conservative going out so that I had enough power coming back against the wind. I hit the 20k turnaround in about 26:40 or 27.9mph. Coming back, I put more effort into it and had a split of about 30:30 or 24.4mph. Total time was 57:15 or 26.0 mph.
Without the wind I would have been deep into the 56's. I wasn't able to ride with my Powertap, but referring to my extensive database of TT's, I would of averaged right at 350 watts. I also have a max HR of about 182 and I averaged 166 for the TT or 91% of max. If I would have gone out harder, I would have averaged 167-168 or about 92%. So, I was slightly into the anaerobic range or, put another way, I was just above my anaerobic threshold. Hope this helps, Kevin