Originally Posted by
merlin55
Many people, myself included, have noticed the same issue. And yes, it is "in your head"
As I said above, there is a large mental aspect but there are physiological reasons for the differences. So it's not necessarily
all "in your head"
Originally Posted by
merlin55
Also with experience we learn that riding 20% harder on the flats increases our speed much more than 20% harder on the flats because of wind drag increasing as the speed squared.
This makes no sense.