About 6 years ago I was riding with 2 of my brothers and a friend down river road in NJ just under the GWB. I clocked in 53.8mph on my MTB (we were all riding MTB). One of my brothers clocked in about 53.2, the other one didnt have a speedometer, but passed me while I was at my max... then failed to brake at the bottom of the hill where we pulled into a parking lot... tried to make a turn, scraped a curb with his front wheel, was ejected from the bike... rear wheel nearly hit the other brother in the face, but he was able to maneuver the bike to keep away from it.

I had to reattach the left crank and right pedal to get him back on the road. I was very surprised that there was not more damage to the bike, especially since he was borrowing his older brothers wheels that day

A couple years ago in Harriman St. park I went down a hill that had a steep grade for about 3mi with a shallower grade for another 3mi. I didnt have a speedometer on the bike at the time, but from the howl on my Campy Chorus 10sp rear hub (53x11)... I would guess that we were over 65mph. I was drafting an ex pro cyclist who estimated about 65mph on that descent. He also was riding a chorus group... man I love that sound. I have hit over 60mph on my city beater Trek 1200 on the same hill that I rode with my brothers on the MTB's. 700x23 vredestein tires. Not as good as the Michelin tires I have on my Trek 2500 Chrus bike. At the time I rode it, it still had a Look carbon frame which splintered on the right seat stay.