Originally Posted by
DrIsotope
I have personally never seen anyone, at any time, post a road ride with a 26-27mph average speed-- including Zwift. Even pro races seem to average around 25mph, and that's a peleton of 150+ of the world's best cyclists. Closed course time trial by a pro? Absolutely. Closed course criterium? Sure.
It isn't as unusual as you think. I did a gran fondo last September and averaged 26.5 mph for the first 65 miles. The fastest guys averaged 26.4 mph for the full 100 miles.