My comfort level is dependent on the situation. I don't go above whatever speed feels safe. Safety depends on the bicycle, the road surface, visibiltiy, and corners. The only time I got really worried was when I had a 2 mile decent down a very steep gravel road. My rims were getting really hot and my brakes were starting to fade. It was not a good situation. Corners often limit my comfort level. Sometimes wind resistance is the limiting factor. I once hit 56mph in ideal conditions with a good road and a tailwind. 45 is fairly common.
Last edited by mtnbud; 04-27-19 at 01:34 PM.