i have them in 31s on my 92 tracker and they rock I will go to 34 when the funds are available. I run them at 20 psi on the road and they are noisy but i love em sounds like a bigmonster coming down the road turns alot of heads then they see whats making the noise and are amused. I cant say how good the 34 will be ( are they 9.5 wide ?) mine are 10.5 wide but they tear up the mud. good luck.