Looks like a really nice bike.
Since it comes OEM with 40mm wide tires, Schwalbe Marathons, can you put anything larger on there? Or, consider a tire with a more aggressive tread. I know Schwalbe makes several options, as do others.
Schwalbes new Dureme comes in 50mm wide. How much wider do you want? Or, their Extreme comes in 40, with a pretty aggressive tread.
I think you should be checking tire options, rather than wheel options.
Last edited by Wanderer; 12-06-09 at 09:02 AM.