Keep in mind that big wheels/tires are harder on suspension parts like ball joints, tie rods etc. These SUVs are hard enough stock on their hard parts due to the extreme weight and no grease ability of parts. I was looking into F150 pickups last year, and was disappointed with the look of the biggest 275/55r20 setup. It just didn't fill in the fender wells proper. It was like a 295/50 or even 305/50 would look so much better. I'm like you that for look, filling the inside of the fender well as far as possible looks best. That's what most 30's-60's resto mod folks do. It's just a clean look. To me, going way off set to bring tires 3-4 inches or more past fenders just looks goofy. If someone is going that route, put on flared fenders. At least that looks halfway right. You asked about steering in an early post, my old 2000 4x4 steers fine, and my jump was from 265/70r17. Your only bumping up a size or 2. Here's a few picks of my 285/50r20's look like on my first edition.
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