So analytic cycling predicts 24.7mph at 239w, compared to my 20.7mph at 239w. 4mph is a huge difference at these speeds. Anybody have input?
I just dug through some data to find a similar effort for me. A few months ago I did a constant 67 minute SST effort around a closed loop at exactly 239 watts. I covered 23.2 miles. Average speed, 20.7 mph. Now I'm shorter and lighter than you (I usually do SST work on the hoods) and we've got a hundred other variable to factor, but I was pretty interested to see how it matched your numbers.