It's a cast wheel. I'm currently running a 295/45/20 and I want to loose about 2" of sidewall height. I was thinking about 255/35/20 but I'm not sure how they would hold up to daily driving.
I run a 255-35-20 on my 20x9 wheels, no problems unless you hit a monster pot hole like i did on the way to showfest and bust a tire, rim still held up though.