Oh man, I have to weigh in on this. 30mph is cranking it. If someone can ride 30 miles in a straight hour I bow down to them. That's professional cyclist material, and even so I doubt anyone of them could sprint that fast for one whole hour. When you see the sprint for the finish line where cyclist are riding so hard the bike is wobbling, that's 30-38 mph. It's hard, and it hurts like hell. I was able to get up to 34 once, but I did not sustain it for long. My legs burned and I had chapped lips from biting my lips.
20-25 mph an hour for a woman is hustling. I can do it, but It would have to be on a straight shot, no stop signs, full of coffee and definitely on the road bike. Even still It would be a test and I would pray for wind at my back.
On a fixed gear, that's pushing it. I dont know Mickey, but the photos and the time she made looks as if she was riding at a comfy pace.
*** mileage was determined by a handy dandy cyclometer. It works like a speedometer on a car.
LA