Hit 92km/h on the MTB (cannondale rush) @ last years epic coming down the devils tail, I was riding on maxxis 1.8rear tyre, when I hit the transition from bitumin to gravel the speed slowed considerably a friend who also used a 1.8 rear hit 110km/h on the same hill he also said he had a couple of guys pass him complete with areo bars in the tuck position, Also in the same race coming into CP2 I was in a train that was averaging 40km/h on the flat.
Have had the roadie up over 100km/h once & that was scary as buggery, did it early 1 morning with a local bunch down the great dividing range.
Looking back it was dumb as a car/truck could've been around any on the bends, I think more dumb luck than any great skill prevented an injury that day.