Yeah I have seen the singles, It would be hard to climb to the top if the hill I live on in a single speed. I do have an old Huffy bike with a two speed automatic in it. It is a low low and a pretty high overdrive. I have had it since 1961. The old bike is worn out, but the rear is okay. Coaster brake, half turn back to shift gears.
Crazed, I don't know how they go through the woods that fast, I watched a video of a couple of peeps riding a trail through tight places and getting big air on a new can-am turbo, I wouldn't even think about getting in the thing, they were missing big trees by inches three feet off of the ground and probably at least 60 MPH on the straights they were close to 90 I'm sure. I may be wild but I don't want to be broke up for the few years an old man has left. I love speed, no top end, but I don't like the idea of living in a hospital bed..