Like I said, it's in the damn build sheet: front 245/45zr20, rear 255/45zr20. I'll take a USPS money order for $600(rounding down). Obviously, Dodge didn't get your approval before they chose to put in different size tires front to rear. It may not make sense to you or even me, but Dodge built it that way. Equally obvious, Dodge didn't care about tire rotation. Hell, they didn't even include a spare tire, probably because there's insufficient room in the trunk for that big of a tire. And if there was room, which size tire would you choose for the spare?