Tires Husq YTH22V42 Tire/rim question

I've got a lot of steep, uneven terrain that I've been working around because I get stuck or cant get traction on. Been doing that for a couple years now and I'm tired of it. I REALLY need to upgrade to larger off road ATV type tires and rims.
Currently it has 20x8-8 tires and rims on it.
Does anybody know where I can get larger rims that fit my mower. While I can make new hubs to fit larger rims I would prefer to not go through the hassle.

Thanks

Any at shop should be able to set you up with an aggressive tread

Look at all the tires you can get in the size you have. You can also get taller tires as well. Bigger rims will do nothing fo you.
https://www.google.com/search?q=20x...49vVAhWh24MKHdCnC_8Q_AUICygC&biw=1366&bih=638