James' wrote:
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
Well you beleive Bridgestone tire site that the PSI doesn't change when loaded instead of some bike site.
Look at bottom of the first page with the pictures of the tiresIf you don't beleive this check the pressure of your tire then jack it up and see if the pressure is not the same. Very easy experiment for you to try. The pressure well be the same on the ground or in the air. Just as your spare tire if set properly you don't have to add more when you use it.
With that I'll turn the thread back to the orginal OP question.
