Ok during the blizzard. I want riding and measured(as best I could)the speed run course. The total length is .4 mile, that includes slowdown and turn around. My guess is around 1000', probably more. I could be wrong as it was very hard to see. Todays run I got to 35mph and was airborn half the time. When ppl say they gps'ed their sled at whatever, are they using a cellphone GPS app?
One thing about my studs, you can stop very quickly. They work better for stopping then accelerating.