JamesDowning wrote:You'll probably be fine. We've had an envoy denali out here once with street tread standard size tires. You may slip a little more, but should be fine. Just be SURE to bring a full size spare - that's the biggest worry to a smaller diameter tire.
I did it on 245/65-17 Destination AT, with no lift, and full armor. I spun less going up rocks and stuff than the guys with M/Ts, but I it was a noisy ride, with the armor and rock sliders banging on everything all the time...
I did flatten a tire (sidewall hole), though, partially because they were still the "P" tires, not LT tires, and the sidewalls weren't all that swift...
Mike