I just got an old 1990 Bayou 220.

It needs new rear tires for sure, fronts seem ok.

Stock rear's are 22x10x10. How big of tires can I go if I get new rims?

I dont care much about top speed or acceleration, I just want to try to be able to do and go where my friend's 4x4's can go.

If I stick with stock , which tires should I get for a combination of snow, dirt, and mud?

Mudlites?

 

I'd try Kenda Bear Klaws. They have excelent reviews and are pretty inexpensive. I just picked up a set off ebay for 80 shipped. And put them on some Itp aluminum rims and put them on my 250x yesterday. So I can't say from experiance how good they'll work. But will be out on the trail this weekend and can give you a better report then.