The wheels and tires are the heartbeat of your truck or Jeep. They provide function, safety, and aesthetics. Tires determine just about everything, including how your vehicle brakes, handles on the road, and utilizes the engine's power. It also just happens to be one of the easiest upgrades you can make that provides instant gratification. Apart from getting the awesome look you want, here's what you should know about upgrading your vehicle's wheels and tires.