..If they'll fit on the stock rims,I'm hoping to try a set of 11.00R-22.5's on it in place of the 9.00's it now has...
Check
this Tech Tip for info and for the
Accuride Wheel Catalog linked in it
On page 39 is a tire and rim chart that gives the acceptable rim widths for different tire sizes. 11R22.5 tires need a 7.5" wide rim at a minimum. Occasionally this info contradicts what the tire manufacturer list, so double check the minimum rim width for the tires you actually plan to purchase too.
Grigg