slightly off topic, but there's a special kit which converts normal wheels into tubeless ones. The impressive thing about this kit is that they did a demo and had a guy ride over a spike strip and he didn't loose any air. Don't remember where I saw this or what it's called, but it might be worth a search. Quite amazing stuff. EDIT: Lol, didn't take long to find it, just entered "tubeless" into google: http://www.no-flats.com/ Go to the movies section