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Keystone was getting ready for 7000 pound axles when they started putting the Mission tires with their 3520 lb rating. The 16" LT tire they used a few years ago would not support 7000 lb axles.
The weakest component in the system sets the rating and that is why to have 7000 pound axles, you need tires rated for at least 3500 pounds.
My 06 2955RL only has a 5000 lb axle but has the higher rated Missions. OK to go heavier and I wish Keystone would have put 6000 lb axles on my rig but in reality to take advantage of more trailer payload, I would have to get a duallie because my SRW is almost maxxed out with the 2600 pounds of pin weight I have now.
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