FastEagle wrote:
The vehicle manufacturer doesn’t seem to have a problem setting recommended tire pressures on RV trailers. They build the trailer around an axle selection and then hypothetically load the axles to the max with an estimated cargo capacity. Most will have tires that are just a little above the axles requirement so all the vehicle manufacturer has to do is set the recommended tire pressure to the maximum allowed by the tire manufacturer and that will cover their six. I just went to a rather large RV showing in Jacksonville, FL and every RV trailer’s tire placard I checked - ALL - from single axles to dual and triple axles up to 7000# had maximum sidewall pressures depicted.
The problem lies with the owner wanting to adjust tire pressures to actual axle loads. It really looks like fooling around with tire pressures today will cause them to be under inflated (overloaded) tomorrow. NOBODY goes to the scales for every trip. Most don’t even check their tire pressures after an overnight stay on the road. The ST tire manufacturers say “OK” we’ll build the ST tires to withstand max sidewall pressures all the time. Just air them to the max and don’t overload the axles and they will work. But, they are not consistent. Some will allow pressure manipulations by the vehicle manufacturer or their recommendations with replacement tires of their brand. POP! Goes the tires. They want full sidewall pressure.
FE
I think you summed up the problem pretty well FE. We are just not getting that 15% margin, and if we did lighten the load and get it, we are letting it out by pressing in on that little thing in the end of the valve stem.
