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Old 04-29-2017, 09:54 AM   #29
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Was sent a picture of a LTX M/S2. LT 265/75/16. Michelin E 80 lbs air...so you have to watch very closely LT or P...
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Old 04-29-2017, 11:11 AM   #30
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Originally Posted by dkottum View Post
I wonder why?
Part of the decisions and load calculations used by tire engineers are the expected application.

All tire load formulas are basically "Air volume" x "Air Pressure" x "Application factor" = "Pounds load"

It is the application factor that gets tricky. Some applications like passenger cars can almost never get loaded to much more than 70% - 80% of the tire load capacity. P/U application in the past was for trucks that spent much of their time with loads. Trailers basically get the smallest (lowest cost) tires allowed so got the 1.1 factor

Station wagons carry more load than passenger cars so they got the 1.1 factor

In the 70's the highway speeds were much slower 55 mph was the law for a long time.

But then RVs got larger (heavier) and highway speeds got faster and SUV's replaced Station wagons. Tire failures increased when the vehicle mfg kept the inflation low for soft ride in their trucks.

What didn't keep pace is RV tires because the industry doesn't want to spend more $ on larger and better LT type tires so failure rates increase.
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Old 04-29-2017, 11:20 AM   #31
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"LTX" is a marketing name like "Marathon" or "Transforce"

There is no such thing as an LTX235/70R16

If your tires have only 35 psi they are Passenger type and have a P in front of the numbers in the tire size.

Please read the entire tire size and when commenting please include the complete tire size including the "Service Description".

I don't know if they used the product name LTX to intentionally confuse customers but that has been the result. The LTX line incluses both P and LT items.

People it's not that hard to read the complete size so you don't confuse others when making a comment. It makes a difference as load capacity can be different based on the Service Description even if the size numbers are the same.
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Old 04-30-2017, 10:17 AM   #32
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That sounds right, 80 lbs air-LT , 50 lbs air-P...
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Old 04-30-2017, 12:01 PM   #33
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LT tires come in load range C with 50 psi max, load range D with 65 psi max, and load range E, with 80 psi max.

The P..XL tires I run on the trailer right now have a max pressure of 50 psi. I am told by the tire people here that they are rated for the same load at 44 psi up to 50 psi. I run them at 50 psi.

Joe, thanks for your comment on brakes. I ordered the brakes from E-trailer. But they did not have the drums with the right bolt pattern. I did find them on Amazon though and will order them there.
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Old 05-01-2017, 11:10 AM   #34
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LT tires come in load range C with 50 psi max, load range D with 65 psi max, and load range E, with 80 psi max.

The P..XL tires I run on the trailer right now have a max pressure of 50 psi. I am told by the tire people here that they are rated for the same load at 44 psi up to 50 psi. I run them at 50 psi.

Joe, thanks for your comment on brakes. I ordered the brakes from E-trailer. But they did not have the drums with the right bolt pattern. I did find them on Amazon though and will order them there.

OK, Just don't forget the need to de-rate the load capacity of your P type tires when used on trailer.
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