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Load Range E tire pressures

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Old 01-20-2019, 11:57 AM
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Originally Posted by marshallr
Since an E rated tire is stiffer you need LESS air pressure to carry the same load as P series tires. You'll just have to experiment. With P series tires I tend to keep 38-40 PSI in my tires for general use and 44 PSI (max) when carrying heavy loads or towing.That is about right for a 3/4 or 1 ton truck, you're needlessly beating yourself up doing that. Way too much for a 1/2 ton. Generally you'll get the best ride,and still plenty of stiffness with about the same, or slightly less air pressure than recommended for P series tires. The wheels on a 1/2 ton aren't designed to hold together at 80 PSI. Look at Smokywren's data. An E rated tire at 45 PSI is rated for way more weight than a 1/2 ton truck can carry.
I don't think you know what you are talking about. My F150 came stock with E tires! The door jam say 55lbs front and 60lbs rear. The max is 80 lbs. At less than 50 lbs you get uneven tire wear from being UNDERINFLATED.
So yes, stock F150 rims on certain f150's are rated for 80lbs and ACCORDING to Ford are supposed to be aired up at the minimum of 55 on the front and 60 on the rear. Stock OEM factory rims and tire.
Old 01-20-2019, 02:21 PM
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Originally Posted by jeffinthebag
So yes, stock F150 rims on certain f150's are rated for 80lbs and ACCORDING to Ford are supposed to be aired up at the minimum of 55 on the front and 60 on the rear. Stock OEM factory rims and tire.
You're talking about the very rare F-150 with heavy duty payload package (HDPP) with 17" tires. Only a tiny percent of F-150s have HDPP with 17" load-range E tires. None of the F-150s with HDPP have 20" tires. And the stock tires on the 2015-2018 F-150 with HDPP and Lariat or above trim are 18" tires with load range C and max 50 PSI. If your F-150 has 18" LT tires, the rims are rated for a max of 50 PSI.
Old 01-20-2019, 03:16 PM
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Smokey, I know your are right. They aren't not that rare. Currently in this area there are 3 2013 or 2014's crew cabs XLTs HDPP for sale . When I bought mine in 2013 in March. I got mine off the lot and there was at least 10 to choose from mostly in the crew and none in the Lariat in the 30 mile radius of my house. I would of got a lariat if they had one on the lot.
When I was buying in March the dealers received a whole bunch for on the lot dealer stock.
Old 01-20-2019, 03:34 PM
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But the original post is about Cooper AT3 XLT LT's . LT's in E rating are 50 front to 60rear lbs and up to 80. If you run E rated LTs less than 50 you are gong to be under inflated and feather the edges. So if the original post doesn't have rims stated for that high. Then he needs to get C rated tires. But his original post is about E's and E's are 50 to 60.
Old 01-20-2019, 06:04 PM
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This goes back to a thread in this section starting on 9/2/18 titled "bought new LT tires for towing and off road"
The thread was about E rated KO2 that is discount tires under inflated. The OP contacted BF Goodrich and the said E tires are to be at 55lbs or more. Thread was only a few weeks ago.
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