I think it's a good start of an idea. However, it's only going to evolve into what we already have- ATVs (snow mobiles and 4-wheelers). Think about it. In rough areas such as snow, dirt, mud, and gravel, to even move you first need balance. Balance comes in 2 forms on machines- 3+ wheels to work or haul and 2 wheels for speedy transportation only. Anything with 2 wheels will topple over without speed. With that being said, aside from going downhill, how will the rider gain speed in rough terrain with this invention?