I'm a plodder, commuter, pleasure rider. Always have been.

Generally I tool around in the 10-12mph range, I suppose, sometimes peaking at 15mph for spurts. But I don't push it nor really track it. Down some hills, I guess I peg above 25-30mph or so, for brief periods, but not because I'm trying.

Once headed down a several mile long, ~12% grade on a bike. Got the jitters, above about 40mph, so kept riding the brakes in the rougher spots in order to keep the speed tolerable. All I could think about was how much road rash I'd have if something broke. Visions of the old film "Red Asphalt" going through my mind ...

Running and skiing, though, I must admit pushing the limits was fun (back in the day). Am too old to be pushing that hard anymore, IMO. Not my thing, though I admire those who can go at such intensities and speeds. Good on 'em for being capable.