Originally Posted by bayoubuggie
Wow, lots of great info. Just to get this straight, if the max tire pressure on the sidewall is 50psi should that be the pressure before loading the TT or after I load it up?
The pressure on your ST or LT tires is the one associated with the max load
for example if
your tire said "2000 lbs max load at 56 psi" then I am saying that to get the best durability you need to confirm two things.
1. The maximum load on the most heavy loaded tire MUST be below 2,000# and many strongly recommend below 1,700 and no more than 1800#
2. For TT with two or more axles you should set the cold inflation to 56 psi for the example tire or in your case 50 psi if that is the number molded on the sidewall, to have the lowest inter-ply shear. (This shear is the force at the belt edge trying to tear the belts and tread off the carcass whenever you turn any corner.
Now go read your tire and then get the actual tire loads when you have the trailer fully loaded (food, water, clothes etc)
shows how to calculate the individual tire loads. Don't be put off by it being "5th wheel. The math is the same.
You can PM me if you have questions