With a constantly blowing 25 mph NE tail wind just yesterday, I had no problem doing at least that. The ride into the headwind was miserable. Those in the touring threads seriously need to get a multi-gear bike for those riding conditions. But the tailwind was strange, normally you can hear the air in your ear canals while riding that fast, this was the quietest 25 mph I ever rode. And moving with the wind, the air flow seemed non-existent and made for a hot ride. Easiest 15 miles I probably ever rode. I wish I knew how fast I did get it going to though ?