What is the Gross Weight on a 2005 International 9400I Truck Tractor?

The Gross Vehicle Weight Rating is determined by the weight rating of the chassis and the axles. A typical road tractor will have drive axles rated at 40k (total) and a steer axle rated between 12 and 13k. Weight rating and legal weight limit under the bridge law are not one in the same, keep in mind.