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Originally Posted by Narnia
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NOTE: #2, you may get lots of recommendations to go to the Sailun brand tire. To take advantage of that tire you will need to get new wheels. The Sailun is a steel cased tire for much heavier trailers than yours. Sailun tires are mostly mail order tires. The Carlisle CSL (also a steel cased tire) can be found at Discount Tire stores and Walmart.
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Really?! New wheels? Is that what everyone has had to do?[/QUOTE]
Back in 2010 Keystone specked everything "close to the bone". Because of your 6000# axles they had no reason to use wheels with more than 80 PSI pressure rating. So you should get the wheel brand name/wheel part number and give the wheel manufacturer a call. They are required by regulations to provide you with the wheel specs. They are not required to put those specs on the wheel. The reason OEM wheels have some information on them is because the OEM provided requested such information be displayed somewhere on the wheel.
Should you find out that your wheels are 80 PSI wheels it would not be advantageous to use LRG tires. If your axles are spaced at least 33" apart you can upgrade to the ST235/85R16 LRE and get 3640# of load capacity at 80 PSI which would provide you with about 25% in load capacity reserves.