[powerhaulic]

Ours came equipped with Sailuns 235/80-16G. I removed tires and installed TPMS to communicate with our new GMC for pressure and temp.
I threw the tires on the balancer out of curiosity before dismount. I was pleasantly surprised how true the tire runs, and balance was not too bad. (worst one was 3oz out)
Spending the time to do a good balance, and having nice round tires makes the towing experience more enjoyable.
Back to the real reason for my reply, when these wear or time out they will be replaced by 235/85-16 as i could raise the rear a touch for perfect leveling. We're at 5" box clearance.