I've had the pleasure of riding Colorado's Triple Bypass the last 3 years in a row. Last year while decending Loveland Pass I actually broke the 60 mph mark for a sec. I could have gone faster but visions of tire blowouts, bad brakes, mechanical failures, etc, starting popping through my head.
What I've learned is at those speeds the slightest bump, pebble, road hazards, are greatly enhanced and the risk is something too much for me.
I'm comfortable at speeds just below 50 but only because I've ridden so several times. The first time I was scared half to death.
Can't wait to do it again this July....
Sarge