I just read over on Car & Truck News the following about the wheels on the 2003.
"Designed with a holistic safety approach, Dodge Ram Heavy Duty utilizes both conventional safety features, such as air bags, and combines them with accident avoidance features such as excellent steering, handling and braking. Standard ABS, the largest brakes in its class and <b>17-inch wheels and tires</b>-the largest standard wheels and tires on a heavy-duty pickup-all contribute to Dodge Ram's excellent safety capability. "