Wheels for tubeless tires?
 

Does anyone know what / where I can get wheels that will fit the GZ250 so that I can use tubeless tires?
This may also be a stoopid question, but can the tires that come on the GZ250 be used without an inner tube on a solid rim?

First question, don't think ive ever seen any. Not saying its not possible (with some modification), just havent seen any gz specific aftermarket rims. There are a few places that will seal your spoked rims so you can run without tubes though.

For the second question, yes.