I have hit close to 60MPH just once in my life (on a downhill at 53x12). Scared the bejesus out of me, and I have vowed never to attempt to descend at anything close to that again. Extremely scary in terms of bike handling -as I just felt I was barely hanging on-, and I dare not touch my brakes, as I was afraid of wiping out. And to add the mother of all fears, there were intersections on the road, and I could not brake if a car had come thru.

Just terrible way to ride. Extremely scary.