2013 Jeep Grand Cherokee Owner's Manual - Page 556

554 STARTING AND OPERATING Gross Vehicle Weight Rating (GVWR) The GVWR is the total permissible weight of your vehicle including driver, passengers, vehicle, options and cargo. The label also specifies maximum capacities of front and rear axle systems (GAWR). Total load must be limited so GVWR and front and rear GAWR are not exceeded. Payload Each axle GAWR is determined by the components in the system with the lowest load carrying capacity (axle, springs, tires or wheels). Heavier axles or suspension components sometimes specified by purchasers for increased durability does not necessarily increase the vehicle's GVWR. Tire Size The tire size on the Vehicle Certification Label represents The payload of a vehicle is defined as the allowable load the actual tire size on your vehicle. Replacement tires weight a truck can carry, including the weight of the must be equal to the load capacity of this tire size. driver, all passengers, options and cargo. Rim Size Gross Axle Weight Rating (GAWR) This is the rim size that is appropriate for the tire size The GAWR is the maximum permissible load on the front listed. and rear axles. The load must be distributed in the cargo area so that the GAWR of each axle is not exceeded. Inflation Pressure This is the cold tire inflation pressure for your vehicle for all loading conditions up to full GAWR.