MFL wrote:
Agree with IdaD, as to using RAWR/tire rating. To get available pin, it is best to load gear, passengers, and pets in the truck, and go weigh the rear axle. This will tell you what is left for pin wt. Don't forget to add the weight of the hitch, if you don't already have one installed.
Jerry
X2 ^^. Also load the fifth wheel hitch and make sure you have full fuel. The CAT scales will give you separate front (steer) and rear (drive) axle weights. Subtract these scale weights from the limits on your door sticker and that's your leftover payload (rear axle is most important, as stated).
Rob