Not 70, but at least 45....I used to run downhills on skateboards...long before Hayabusas... :oldcool: The illusion is the sound of the air and the terrain as it passes, but on a steady board anywhere between 45-50 is screaming....bear in mind..the needed stopping distance...better to pass and plan the slow-down !!! The luge guys have it better as in a speed suit, the less wind resistance the better..standing up slows you down, a tuck helps....boy that took me back....and I grew up out there...what a rush !!!