Thanks for the info. I had read about the "pinch weld modification" but wasn't sure what that was, and I'm not really interested in doing that. I'd like the biggest tires I can reasonably put on my Commander with the 2" lift and 1.5" spacers, though I hadn't taken the engine into consideration so I appreciate the heads up on that. In the original thread I had read it was sounds like the 255/75R17's would also require hammer down the pinch weld (as they said it), so I was thinking that 265/70R17s might work?Be prepared to do the pinch weld modification at the very least. Because you will have tires about 3" taller than the stock 29.5 inches be ready to also change your gear ratios as your 3.7 V6 will really struggle under any kind of load!