I need to put tires on my 1999 K2500 suburban with a dually rear end. It is not lifted and I don't plan on lifting it unless I need. It currently has 245/75/16 tires. They fit fine and don't rub on each other on the rear axle. I would like to increase the size a little bit if possible. I know a regular suburban can fit 265/75/16 tires. I don't know if those would rub or not if used as duallys. I know the 235/85/16 is about the same height and they fit on the dually pickups but they are not as wide as the 265/75/16. Has anybody used a 235/85/16 on a suburban or used 265/75/16 as a dually?