Choosing the right tires for a tow vehicle makes a huge difference in how it handles a load. Tires have a maximum weight rating written on the sidewalls that dictates how much weight they can bear. Most light trucks, SUVs and vans are factory-equipped with P-rated tires. P means “passenger,” and they’re weighted to give the optimum middle ground between load-bearing stability, capacity and a comfortable ride. “Light truck” tires (LT) have a higher load capacity than do P tires. We wanted to see how our test vehicle would behave with three different tire matrices using our test truck, a Nissan Titan Crew Cab LE. Here are the results.