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Old 02-15-2013, 12:14 PM   #15
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Originally Posted by Airstream Dad View Post
I did a little homework online and the Michelin LTX M/S2 might be a step up to an LT class tire. I noticed it's also at the top of the Consumer Reports tire list for an All Season Truck Tire. Lastly, there's a Costco $70 off coupon running right now on a set of four.
The LTX MS2 is highly regarded and is a good all-season highway tire. I don't think you'll find anyone who will complain about it.

I have LTX Winters on now which are a very similar tread. I've been happy with them.

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Originally Posted by barts View Post
I run the Michelin 16" load range E LTX A/T tires on our F250; they offer more off-road traction at the cost of slightly more road noise.

I've been very happy with these tires; we tow our Airstream on some pretty steep dirt roads and these really help with peace of mind. If you don't do much off-road, you can't go wrong with the Michelin M/S-2 tires.

- Bart
I run LTX A/T2 lre tires in the summer, they do have a little more offroad traction. Because these are not siped they're no good on icy roads.
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Old 02-15-2013, 03:31 PM   #16
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So I did a model search on Tire Rack, and many of the LT tires mentioned by posters in this thread for their F250s and such aren't even listed as available for my 2011 Durango. I wonder if it has to do with TPM system support or other issues.

But I checked the load rating of the Micheln LTX M/S2, and it's 109, or 2271 lbs per tire.

I have to assume that the load rating of the tires was a factor in calculating both the GWVR, and from there to the hitch weight rating, which in turn can be spread over all four wheels via a hitch weight distribution system.

So far so good on my old tires, so I guess I should be OK on an even better pair.

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Old 02-17-2013, 09:37 PM   #17
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Load Range E tires on a vehicle not spec'd for them (wheel weight rating) are not the best choice, IMO, as they tend to ride hard when solo and one cannot air them up past the wheel rating.

Again, ask the tire manufacturers directly for their recommendation for your vehicle and intended use. It's the best place to start once you have that information in order to make comparisons to other brands, models, etc.

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Old 02-18-2013, 12:06 AM   #18
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This tire thing is driving me crazy.
My Tundra has P275 tires. Each tire has a max load carrying capacity of 2601 pounds when inflated to 44 psi.
Take 2601x4=10,404 pounds of load carrying capacity. The GVWR of the Tundra is 6900 pounds. Looks to me like I have 10,404-6900= 3,504 pounds of excess load carrying capacity in the tires over the GVWR of the Tundra.
So why all of the concern with the P rated tires?
Under normal driving conditions. I run 33 psi in the rear and 30 psi in the front. When I tow my 26' Argosy, I run 40 psi in the rear. I have had absolutely no handling problems at all.
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Old 02-18-2013, 12:18 AM   #19
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We prefer the Michelins in load range E ...
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Old 02-18-2013, 12:51 AM   #20
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Extract from Tire Rack - Your performance experts for tires and wheels product description for Michelin LTX M/S2, 275/65x18 (the tires on our Tundra CrewMax):

"The tire’s internal structure includes twin steel belts (three steel belts in Load Range D and Load Range E sizes) to provide the strength and durability needed to handle heavy loads."

In addition, the load range E tires we bought are "LRR" (low-rolling resistance); and the P tires are not.

Compared to the OEM BF Goodrich Rugged Trails that came on our Tundra when it was new, the Michelin LR-E tires track straight as an arrow, with none of the squirm that was felt with the OEM tires when towing. Probably due to higher inflation pressure, the Michelins also wear much more evenly; and I expect them to run twice as long as the BFG's. Also, you probably can't measure it; but the Michelins just feel more stable at highway speeds.

When we had the BFGs, I inflated the Tundra's rear tires to 44 psi (the maximum printed on the sidewalls); and they always looked under inflated, and the tread wore out quickly (at around 35,000 miles). I tried 55 psi on the Michelins on our first trip, and later switched to 65 psi. Here in the desert southwest, 55 psi resulted in a several degree drop in running temperature compared to the BFGs at 44 psi; and 65 psi dropped the running temperature another couple of degrees. In addition, the rear tires no longer look under inflated (as indicated by the contact patch on the ground and shoulder wear).

Just my opinion, but I'm sure that P tires are fine for those using a half ton pickup as a daily commuter or station wagon; and they tow infrequently, or only light loads. However, for frequent towing and heavy loads, LT tires are the safer and more reliable choice for pickups.
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Old 02-18-2013, 10:52 AM   #21
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Originally Posted by TG Twinkie View Post
This tire thing is driving me crazy.
My Tundra has P275 tires. Each tire has a max load carrying capacity of 2601 pounds when inflated to 44 psi.
Take 2601x4=10,404 pounds of load carrying capacity. The GVWR of the Tundra is 6900 pounds. Looks to me like I have 10,404-6900= 3,504 pounds of excess load carrying capacity in the tires over the GVWR of the Tundra.
So why all of the concern with the P rated tires?
Under normal driving conditions. I run 33 psi in the rear and 30 psi in the front. When I tow my 26' Argosy, I run 40 psi in the rear. I have had absolutely no handling problems at all.
Based on the load capacity and the fact that you're happy with the handling, I suspect that your P tires are the "XL" variety, which is something of a 'tweener. My tires are that variety (265/60R18 XL) and I'm also satisfied with their performance towing our Argosy. The beefier structure of XL P-Metric tires seems to give some of the benefits of LT tires. Some of the difference may be in the shorter sidewall combined with the XL carrying capacity, but they don't seem to squirm noticeably even when towing.
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Old 02-18-2013, 12:36 PM   #22
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They are P275/65R 18 114T M+S
Not sure what the 114T stands for. Obviously the M+S is mud and snow.
I will see if I can find info on the meaning of 114T.
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Old 02-18-2013, 12:58 PM   #23
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They are P275/65R 18 114T M+S
Not sure what the 114T stands for. Obviously the M+S is mud and snow.
I will see if I can find info on the meaning of 114T.
114T is a "load index" designation. Mine are 114T as well, which translates to 2601 lb per tire.
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Old 02-18-2013, 01:13 PM   #24
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The 114 is the load rating = 2600#
The "T" is speed = 118 mph
So the load rating is roughly in the same ball park as the "D" rating. But this tire only requires 44 psi to get to max load rating.
Seems to me it would be a softer ride. Which is what A$'s like.
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Old 05-11-2013, 02:37 PM   #25
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I finally got why "P" tire load ratings are not equal to LT load ratings. Thank you tire rack. The increased height of the center of gravity on trucks decrease the load capacities of P tires by about 10%.
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Old 02-23-2014, 08:30 PM   #26
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Phoenix, I just purchased the P275/55/20s for my Suburban. Why do you recommend 44 lbs in the rear tires? Why would I not put 44 in the front as well? And if not what is the recommended pressure for the front tires?
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Old 02-23-2014, 09:38 PM   #27
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I have an '08 Jeep Grand Cherokee that came with P245/65R17 Goodyear Fortera HL tires. I was prepared to replace them promptly with better tires because I thought the P rated tires would not be good for towing. I was wrong.

I got 80,000 miles with about 40,000 of that towing our Trade Wind. They wore evenly, and rode good. I replaced them with another set of Goodyear Forteras and have 53,000 miles on them with plenty of tread left.

The door placard recommends 33 lbs. I tow with 35 lbs. in the rear and 34 lbs. in the front. In warm weather, the pressure increases to 38 - 40 lbs when driving.
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Old 03-17-2014, 06:36 AM   #28
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Hi Airstream Dad - Not sure if you changed out your tires yet - don't visit here much.

I have the same exact tow vehicle you do, assuming you have the 18" tires. I went with a set of Nokian WRG2 tires. They're a bit of an odd duck, combining the winter traction of a snow tire with the better dry grip of an all-season. Very high load capacity.

They're expensive and you need to hunt around for them (or mail order them) but I've been very happy with them.

Tom
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