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Old 01-15-2018, 02:10 PM   #1
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P to LT?

Anyone have any real world feedback on switching from P to LT tires in regards to towing? It's time for some new shoes on the F150 and while I am not at all dissatisfied with my current towing experience, if LT tires will make a marked improvement it would make sense to move up.

Looking for the good and the bad if anybody has made that switch. Currently contemplating moving to the Michelin Defender M/S LT Rated, E load range. I currently run the Michelin LTX M/S2 P.

Thanks in advance!
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Old 01-15-2018, 02:55 PM   #2
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I went from P to LT on a Tundra I had. Due to the stiffer sidewalls, it made a world of difference with no constant bouncing of the truck.
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Old 01-15-2018, 03:11 PM   #3
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I went from P to LT on a Tundra I had. Due to the stiffer sidewalls, it made a world of difference with no constant bouncing of the truck.
X2!

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Old 01-15-2018, 03:45 PM   #4
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I went from P to LT tires on my wife's truck. I will agree that it was a good move.
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Old 01-15-2018, 03:47 PM   #5
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My F150 came with LT tires (max payload package). Tows great with them and will be replacing with in LT tires this spring.
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Old 01-15-2018, 03:57 PM   #6
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Originally Posted by K2tiger View Post
Anyone have any real world feedback on switching from P to LT tires in regards to towing? It's time for some new shoes on the F150 and while I am not at all dissatisfied with my current towing experience, if LT tires will make a marked improvement it would make sense to move up.

Looking for the good and the bad if anybody has made that switch. Currently contemplating moving to the Michelin Defender M/S LT Rated, E load range. I currently run the Michelin LTX M/S2 P.

Thanks in advance!
I can tell you there is no comparison, LT yields a far better experience towing than P tires ever will.
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Old 01-15-2018, 04:44 PM   #7
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Much better for towing, but you should be aware due to the strong construction LT tires are heavier then P in the same size, and will effect fuel economy.

I family member who works for a company that has a large fleet says it's about 1 MPG difference between P tires and LT load range E on an F150 for empty driving. If you tow a lot, it's still worth it.
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Old 01-15-2018, 05:37 PM   #8
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When I was using my F150 to tow my 28' toyhauler I went to Michelin LT tires after one season. It was so much more stable, especially when large trucks passed me. I didn't get sucked in nearly as much. And I didn't notice any difference in mpg.

The F150 is my daily driver now and I would buy the same LT tires again, even though I am not towing the RV anymore
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Old 01-15-2018, 06:25 PM   #9
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Thanks for all of the great info, everyone. It sounds like the positive attributes will likely outweigh the negative.

Thanks again!
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Old 01-15-2018, 06:28 PM   #10
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I will go LT next time. I am not in a place to just chuck brand new Michelins. But I will go with the LT when I need tires.
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Old 01-15-2018, 06:56 PM   #11
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Two huge advantages to load range D or E tires...

The big advantage is a stiffer sidewall, allowing less side to side movement when towing. You will instantly feel less sway and push/pull simply because the tires aren't allowing the truck to rock back and forth.

Because you have a stiffer sidewall, your tire is flexing less as you drive, keeping it cooler. Much of the heat that is generated is due to the tire "bulging" at the contact patch. Stiffer sidewalls due to construction and higher PSI significantly reduce the "bulge" and keep your tires much cooler rolling down the road.

I think that you will find D or E rated tires to be exceptionally beneficial for you. I think its a great addition to any tow vehicle.
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Old 01-16-2018, 02:39 AM   #12
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I can't speak to the difference between P and LT tires since all I ever had were P tires on my first truck. I had just put on a new set of P's before getting my first trailer, and I traded that truck before the P's wore out.

My second truck came from the factory with LRE tires since it is the HDPP variety of truck.

If I had ever needed to replace tires on a truck I towed with, the new ones would definitely be LT tires.
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Old 01-16-2018, 06:53 AM   #13
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LT tires have stiffer sidewalls. If you ever get the chance, sit on an LT tire standing..just the tire. Chances are it will support your weight. The P tire will most likely buckle from the weight. Regardless of what you're towing, I'd recommend them.
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Old 01-16-2018, 08:18 AM   #14
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I wish I could put LTs under this truck without changing rims! But I cannot, and have no desire to change rims, right now. Currently I hate my newest set of P’s. I have run LTs before, and one thing I can tell you is the general ride conditions with no load, you will notice the ride is stiffer. With no load, I would drop the tire pressure, and with a load I would increase the tire pressure. I never ran the same tire pressure all the way around ether. When I get new tires, I would write down the tire pressure, drive the rig, judge how it felt, then the next trip, change the pressures by 5-10 pounds, till I found a pressure combo that I like. On my current tires, I run 5 psi higher in the rear tires than the front tires.
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Old 01-16-2018, 08:56 AM   #15
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If one switches from a 'P' tire to a 'LT' tire, is the pressure required in the tire the same? IE, is my door placard still correct?
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Old 01-16-2018, 09:20 AM   #16
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I would stay with the passenger tire. Be sure to press them up to max when towing. Unless your planning to pull a lot over the course of a year or more. I lost ride comfort in my Tundra when I put LT's on it. But as a full timer I needed LT's.

PIC: My sidewall cracking on not pressing them to max air, my fault.
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Old 01-16-2018, 09:36 AM   #17
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I'm torn on the tire issue. My rear axle is rated to 3800 pounds, and my P rated tires combined can take 5400 pounds. I'm never going to max out the tires; the axle is the limiting factor.
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Old 01-16-2018, 09:47 AM   #18
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If one switches from a 'P' tire to a 'LT' tire, is the pressure required in the tire the same? IE, is my door placard still correct?
No, the door placard will not be correct. Had mine installed at the dealer and asked 6 times, and was reassured that 35 psi was still correct because they were too lazy to verify. I then researched online but could still not get a straight answer other than the inflation would be significantly higher and went back to dealer. All they could be bothered to do was give me the phone number of their Michelin supplier who told me I should check with Ford !

Ultimately, I decided on 48 psi which is the same recommended inflation for the Heavy Duty Payload Package F150's that come from factory with LT tires and recommended inflation door placard is for LT tires. My truck weighs the same as the HDPP F150 so recommended tire pressure should be the same.

To the OP, I wouldn't replace a brand new set of P-rated tires with LT's but it is definitely worth the extra $15 a tire when it is time for a new set of tires. The unloaded ride is a little bit harsher, but it is more than made up by the increased stability while towing.
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Old 01-16-2018, 09:49 AM   #19
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Originally Posted by Ottawasteve;600756

Ultimately, I decided on [B
48 psi[/B] which is the same recommended inflation for the Heavy Duty Payload Package F150's that come from factory with LT tires and recommended inflation door placard is for LT tires. My truck weighs the same as the HDPP F150 so recommended tire pressure should be the same.
Next question, if you don't have a HDP rim, how do you know your P rim can take that pressure?
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Old 01-16-2018, 09:53 AM   #20
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I'm torn on the tire issue. My rear axle is rated to 3800 pounds, and my P rated tires combined can take 5400 pounds. I'm never going to max out the tires; the axle is the limiting factor.
I went through the same thought process. Can't overload a P tire or LT tire without severely overloading the axle and I can't carry more weight because of having LT tires because like you the RAWR is the limiting factor. When you are towing in the upper limits of your RAWR, you will definitely appreciate the added stability of the LT tires for the slight additional cost over a comparable P rated tire.
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