Dont know how long the wheels would last.

http://www.youtube.com/watch?v=K-SUdyGIUPM 
http://www.youtube.com/watch?v=KVBVqqVZ93A 

I had a go on my nephews and flipped it on a flat road with only pedal power. And his has a fully sik wing.

pvc pipe can bee used to cover the wheels if you have a source of it for cheap/free, just like retreads