It is indeed the valve stem that gives you the psi rating for the wheels, and if you'd like you can go to a bolt-in valve stem rated for over 100 psi, the Americana Metal, Bolt-In Valve Stem # AM20906.
You can use this valve stem along with a 16" x 6" wheel with a 6 on 5-1/2" bolt pattern to get its complete 3,050 capacity, the Dexstar Steel Mini Mod Trailer Wheel - 16" x 6" Rim - 6 on 5-1/2 - Silver Powder Coat # AM20746.
Then, since you want a 14-ply tire, you'd have to go with a load... view full answer...
Yes, the Adco Olefin HD All-Climate + Wind RV Cover for 5th Wheel Toy Hauler # AD89ZR will work fine in north west Montana in the winter as this cover is designed to work in long term storage in all climates. view full answer...