My 90 YJ has some after market rims on her, and im going to get new tires soon. Found a really nice set of Goodyear At's with some good knob to them. Only size they offer is 31 x 10.5 r15. I currently have 235 75 r15. Can I fit these on my YJ? She has no lift, and the dimensions I found for 235 75 r15 is 29.5 x 9.5.