Just relax, you dont have to o fast downhill. If youjust want to get comfortable at a certain speed and then go 5 mp faster, when your comfortable there, step it up. Push your encelope, but dont ride outside it, youll be a danger to yourself and potentially other riders. I come from a motorcycle racing background so i already had the want to go fast and was comfortable at those speeds, downhills justkinda cme naturally.