Tires

The proper inflation pressure for any tire is determined by the highest load it is most likely to carry. Tire companies publish load/inflation tables. To see these tables for Goodyear tires go to http://www.goodyear.com/truck/tireinfo/safety.html Of course you need to know the load on each tire. With a vehicle loaded, have the truck weighed axle by axle. Divide the steer axle weight by two and any other axles by the number of tires on each axle. If it is difficult to measure just the forward or rearward axle of the drive or trailer axles, weigh the tandem axle load and divide by the number of tires (usually 8). For the size tire you are running, find what inflation pressure corresponds to the load on each tire. When in doubt, round up to the next hightest pressure. It is always better to have too much inflation pressure rather than too little.