Want to widen stance and throw mud tires on, help!

I’m picking up my brand new 900 trail tomorrow, from what I read she could be a little tippy, I plan on widening her a little bit when I put aftermarket rubbers on, thinking about mega meyhem or executioners , probably around 28 inch. Can I buy different rims to offset them out more? And possibly wheel spacers too? I’d like to be around 56-58 inches when said and done, I’m new to this and would appreciate any input. Thank you:)