i don't know how cool ours are in relation to yours, but i'll still brag about them
basically, our front wheels are monsters, they're 8 inches wide and 8 inches in diameter (I nicknamed 'em square wheels since they're 8 by 8
) we have conveyer belt traction around them, and they look very imposing. the back wheels are our omni wheels (basically a powered caster, with pretty darn decent traction). the rollers are compressed lexan, with ridges to better dig into the carpet. Tom, you got any pictures you can show?
Stephen