Originally Posted by
davei1980
I also heard most grand tour teams have gone to 25mm tires and some Specialized-sponsored teams with 26s, again, WAY too narrow for everyday riding but efficiency doesn't always win races. They're made for a sprint-finish not for pedaling efficiency or comfort.
The vast majority of world tour riders are domestiques, and they do not participate in the sprints. If super wide tires offered an advantage, they would be using them.