The 10.5-inch rearend also sports 4.56 gears. The differential is a helical-gear limited-slip until it's electronically locked, making it a full locker. Specially tuned leaf packs and staggered Bilstein high-pressure gas shocks allow the Dodge to work well with a load or in the dirt. The 285 (33-inch) spare fits fine under the truck. A 35-inch tire will also fit there if a tire size change is in the offing.