Ted, If you are in the Wash-Or area, a quick way to get your coach's axle weights is to stop by a state truck weigh station that is closed. You'll see these weight stations along the freeways as well as secondary roads. If not in use at the time, I'll pull in, the scale readout is always on. Set your front axle on the scale and write down the reading, do the same with the rear axle and you then have the info you need for your tire purchase. Check your state DOT for weighing locations. I like the ones on secondary roads, not much traffic. Welcome!