Originally Posted by WhyFi

Well, a few things. First, I think that the calculation is a lot of best case/benefit of the doubt. That's not a remarkable amount of power but exceedingly few people IRL would see that kind of result. There's also the climb, which certainly would have brought down the average (I assume this estimate is on the flats?). And the estimate is 1mph slower - at 15mph, gaining 1mph is nothing. At 24mph, gaining 1mph is so, so huge. IMO and IME, 24.9mph, on a road bike, at 264w, is pie-in-the-sky.