Anyone into em? These are gravity powered vehicles, basically bmx bikes turned into downhill racers, no cranks, flipped frames, smoothies and v or disc brakes and a couple other mods. I'm thinkin about building another one, been years since I've done any coasting. It really helps on carrying corner speed, no accel so the more you carry out the faster you are. The spiral would kick ass on a GPV and it would be a great way to get your cornering fix on without worrying about the pigs.