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Old 05-18-2013, 07:03 PM   #1
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Joined the LT tire movement

Put on a set of Michelins today, 235/75 r15 LTX MS2. They have a weight rating of 2183 lbs per tire at 50psi. I have them mounted on a Safari 30 GVWR of 8400lbs but I have never weighed more than 7700 lbs.

This is my fourth set of tires, never had a Marathon blow out but never got good wear out of them. Last set had three tread separations. Second set of tires were Maxxis, fairly good wear but one tread separation. I am really good about checking pressure but do like to tow at 70.
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Old 05-18-2013, 07:27 PM   #2
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I am not about to dive into the tire issue talk, but would be interested in knowing how they work out for you. I may need 6 of them before too long.

Thanks for posting.

John
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Old 05-18-2013, 07:47 PM   #3
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I don't normally like making multiple changes at once, but I am also changing my hitch to a ProPride and tow vehicle. Been towing with 3/4 ton suburbans since my trailer was new and moved to a GL350 . Going to be interesting!
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Old 05-18-2013, 07:50 PM   #4
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Yep, there are a lot of new variables there.

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Old 05-18-2013, 09:27 PM   #5
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Quote:
Originally Posted by SafariSS View Post
Put on a set of Michelins today, 235/75 r15 LTX MS2. They have a weight rating of 2183 lbs per tire at 50psi. I have them mounted on a Safari 30 GVWR of 8400lbs but I have never weighed more than 7700 lbs.

This is my fourth set of tires, never had a Marathon blow out but never got good wear out of them. Last set had three tread separations. Second set of tires were Maxxis, fairly good wear but one tread separation. I am really good about checking pressure but do like to tow at 70.
Your new Michelin tires actually have a maximum load capacity of 1984# (ea) when fitted to RV trailer axles.
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Old 05-18-2013, 09:33 PM   #6
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My trailer has the Marathons. I saw some on the lot that hadbMichelin. I know Michelins are good because I got 130,000 miles out of my last set on a Chevy Express van. I will get Michelins next.
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Old 05-18-2013, 09:41 PM   #7
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Your new Michelin tires actually have a maximum load capacity of 1984# (ea) when fitted to RV trailer axles.
I am willing to take my chances after having poor luck with ST tires. I figure my lower side skin would be about 5k to replace and do not want to worry about a total tire failure.
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Old 05-30-2013, 05:45 PM   #8
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Thumbs up Upgraded to 15" Michelins

I also mounted a new set of Michelin 235/75R15 LTX MS2 today, replacing the original 14" Goodyear Marathons on our 2011 FC23FB. The Marathons had been problem-free for 2 1/2 years and 24,800 miles, but I decided to heed ST manufacturers advice and not extend them on time and mileage. I purchased the Michelins mounted and balanced on 15" Raceline wheels from performanceplustire.com - great prices, service, and fast and free delivery to my door. The larger wheels and tires fit just fine and look great. I'm happy to have the additional 1.1" of road clearance. On the 30 mile road test across the mesa in very gusty winds, and then up and down a few 8% curvy grades, the unit tracked perfectly without sway - just as it always has. (I tow with a Jeep Grand Cherokee Diesel and Equalizer Hitch).

Thanks to those who have made this upgrade before me and shared the fit information for these larger wheels and tires on the FC23FB.
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Old 05-30-2013, 06:29 PM   #9
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Your new Michelin tires actually have a maximum load capacity of 1984# (ea) when fitted to RV trailer axles.
Just curious, where do you find this information? I'd like to check other tires' ratings. I didn't even know they rate LT tires for trailers.

I like the idea of 70,000 miles.

-Kevin
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Old 05-30-2013, 06:59 PM   #10
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Your new Michelin tires actually have a maximum load capacity of 1984# (ea) when fitted to RV trailer axles.
I haven't seen that number anywhere. The Michelin web site says max load, single tire......2680@80 lbs psi. Are you talking 1984 at less pressure?
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Old 05-30-2013, 07:07 PM   #11
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Quote:
Originally Posted by SafariSS View Post
Put on a set of Michelins today, 235/75 r15 LTX MS2. They have a weight rating of 2183 lbs per tire at 50psi. I have them mounted on a Safari 30 GVWR of 8400lbs but I have never weighed more than 7700 lbs.

This is my fourth set of tires, never had a Marathon blow out but never got good wear out of them. Last set had three tread separations. Second set of tires were Maxxis, fairly good wear but one tread separation. I am really good about checking pressure but do like to tow at 70.
Are those P235/75R15/XLs? Load Range C (50psi)
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Old 05-30-2013, 07:54 PM   #12
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I installed five of the Michelin LTX (P) 235/75R15 XL tires using the OEM aluminum wheels on my 2013 International Serenity 25FB with a GVW of 7,300 pounds. Each of the trailer axles are rated 3,600 pounds. These tires have a weight rating printed on the sidewall of 2,183 pounds @ 50 psi. Per 49 CFR 571.110, when these tires are used in non passenger type vehicles, the load capacity must derated to 1,985 pounds (10%). That Michelin tire diameter is 28.9" as compared to the GYM ST225/75R15D tire diameter of 28.3". If the tire weight rating for two tires exceeds the axle rating on the vehicle door plate, the weak link in the support chain would in theory be the axle. I run 50 psi in these tires.

Many in the tire wars threads switched to the same tire and wheel Airstream used on the Eddie Bauer trailers. Those are the Michelin LT 225/75R16E LTX M/S2 tires rated 2,680 pounds at 80 psi. These tires are 29.2" tall, or 0.9" taller than the GYM ST tires. The SenDel T03-66655BM aluminum wheel was used by Airstream. That black high lighted wheel has been discontinued. The plain aluminum wheel part number is T03-66655T.

My 3/4 ton Dodge has a rear axle rated at 6.010 pounds and the two factory installed Michelin LT265/70R17E rear tires at 70 psi are rated at 6,010 pounds. At 80 psi they are rated at 6,390 pounds. I would think the factory considered a safety margin in there somewhere when selecting these tires. The front axle is rated 5,500 pounds and the recommended tire pressure is 45 psi for the two factory installed Michelin LT265/70R17E tires to generate a two tire capacity of 5,510 pounds.

Nothing like real numbers from the items in question.
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Old 05-30-2013, 09:36 PM   #13
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Quote:
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I installed five of the Michelin LTX (P) 235/75R15 XL tires using the OEM aluminum wheels on my 2013 International Serenity 25FB with a GVW of 7,300 pounds. Each of the trailer axles are rated 3,600 pounds. These tires have a weight rating printed on the sidewall of 2,183 pounds @ 50 psi. Per 49 CFR 571.110, when these tires are used in non passenger type vehicles, the load capacity must derated to 1,985 pounds (10%). That Michelin tire diameter is 28.9" as compared to the GYM ST225/75R15D tire diameter of 28.3". If the tire weight rating for two tires exceeds the axle rating on the vehicle door plate, the weak link in the support chain would in theory be the axle. I run 50 psi in these tires.

Many in the tire wars threads switched to the same tire and wheel Airstream used on the Eddie Bauer trailers. Those are the Michelin LT 225/75R16E LTX M/S2 tires rated 2,680 pounds at 80 psi. These tires are 29.2" tall, or 0.9" taller than the GYM ST tires. The SenDel T03-66655BM aluminum wheel was used by Airstream. That black high lighted wheel has been discontinued. The plain aluminum wheel part number is T03-66655T.

My 3/4 ton Dodge has a rear axle rated at 6.010 pounds and the two factory installed Michelin LT265/70R17E rear tires at 70 psi are rated at 6,010 pounds. At 80 psi they are rated at 6,390 pounds. I would think the factory considered a safety margin in there somewhere when selecting these tires. The front axle is rated 5,500 pounds and the recommended tire pressure is 45 psi for the two factory installed Michelin LT265/70R17E tires to generate a two tire capacity of 5,510 pounds.

Nothing like real numbers from the items in question.
So am I correct in assuming that the 10% load capacity derating only applies to (P) passenger not (LT) light truck Michelin LTX M/S2 tires?
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Old 05-30-2013, 10:03 PM   #14
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The code reads passenger tires. The 16" LT 225/75R16E LTX M/S2 tires are specifically called light truck tires so there is no derating required for trailer use. The maximum air of pressure is 80 psi for a load range E rating.

The 15" XL tires are a fish out of water. They are a hybrid of P & LT. You might say an extra load rated passenger car tire. They are called LTX (P) 235/75R15 XL so are derated per the regulation. The maximum pressure is 50 psi.
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