Butch50 wrote:
James' wrote:
Bring up your tire pressure AFTER you load your camper.
This is kind of the same as making sure you put air in your air bags before putting on your tiedowns.
The air pressire is the same before and after you load your camper. The pressure doesn't change. If it is 80 PSI before the camper it well be 80 PSI after the camper is loaded.
I begg to differ. But to each his own. ;-)
The pressure will be higher when the tire is supporting the TC. If you want to imagine a free body diagram, simplify things and consider a TC resting on one big tire. If you take the TC and the truck off, it's supporting no weight - it does not have to exert any force on the axel to keep the TC in static equilibrium. Air is a compressible fluid - pressure will increase when the tire bears a load because it's the "pushing back" of the air that keeps the TC from falling.
clicky
