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Old 08-30-2012, 07:17 PM   #1
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Michelin 235-75-15 LT Tire Availability???

I've recently been researching tires for my 1992 25' Excella (6800 lbs GVW). I've read tons of posts and it seems like many are recommending a Michelin light truck tire in a 235-75-15. My problem is this. According to our local Michelin dealers, Michelin doesn't make a light truck tire in that size. I've been told they make an XL tire called an LTX M/S2 XL 108T in this size, but that this tire is a P-rated passenger car tire, not an LT tire, even though the name of the tire model coincidentally contains the letters LT. According to my local dealers, this tire has a carrying capacity of 1985 pounds. If anyone knows of a Michelin LT tire in this size with more carrying capacity than 1985 pounds, please let me know. Hopefully, some of you can help me become less confused.

Thank you for any help you might be able to provide.

Doug C.
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Old 08-30-2012, 07:30 PM   #2
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Doug,
Here are the specs for the Michelin LTX M/S2. They are rated at 2,183 pounds at 50 psi. The old Michelin LTX M/S LT235/75/15 load range C are no longer in production. They may still be in some tire warehouses. How old they are is anyone's guess. My local tire guy told me last week that he could get four for me.
The LTX M/S2 P235/75/15 XL is the new version of the older LTX M/S LT235/75/15. You would have to call Michelin and ask them the differences.
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Old 08-30-2012, 07:40 PM   #3
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Anyone know the performance difference between a 235 75 15 and a 235 70 16.
There are many posts about people going with the 16" Why spend the extra cash for new wheels. The 15's are the same diameter 235 mm the 16's are a little wider with a slightly shorter sidewall
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Old 08-30-2012, 07:54 PM   #4
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It is a rating game. What you want is the XL tire with the 108T load rating not the 105T rating. P or LT let the numbers speak for themselves. I am running BF Goodrich TA long Trail 235/75-15XL. I have had no problems.

Perry

Quote:
Originally Posted by Doug C View Post
I've recently been researching tires for my 1992 25' Excella (6800 lbs GVW). I've read tons of posts and it seems like many are recommending a Michelin light truck tire in a 235-75-15. My problem is this. According to our local Michelin dealers, Michelin doesn't make a light truck tire in that size. I've been told they make an XL tire called an LTX M/S2 XL 108T in this size, but that this tire is a P-rated passenger car tire, not an LT tire, even though the name of the tire model coincidentally contains the letters LT. According to my local dealers, this tire has a carrying capacity of 1985 pounds. If anyone knows of a Michelin LT tire in this size with more carrying capacity than 1985 pounds, please let me know. Hopefully, some of you can help me become less confused.

Thank you for any help you might be able to provide.

Doug C.
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Old 08-30-2012, 07:58 PM   #5
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When many of us went to 16" Michelins there were no properly sized Michelins in 15" in Load Range D or E.

This new tire system of Passenger tires with 3 subclasses, the XL being one of them, has everyone confused. They started putting P tires on light trucks and SUV's several years ago and that caused confusion too.

Are the XL P tires the same as the LT tires? I haven't figured this out yet.

Gene
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Old 08-30-2012, 07:59 PM   #6
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I think most are running the 235/75-16 in an E rating. This is going to give you a max of 2680lb per tire. I think this is overkill unless you have one of the newer trailers that tops out at over 8000lbs. If you are less than 8000lbs you should be good with the 15's.

Perry

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Anyone know the performance difference between a 235 75 15 and a 235 70 16.
There are many posts about people going with the 16" Why spend the extra cash for new wheels. The 15's are the same diameter 235 mm the 16's are a little wider with a slightly shorter sidewall
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Old 08-30-2012, 08:04 PM   #7
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Originally Posted by perryg114
I think most are running the 235/75-16 in an E rating. This is going to give you a max of 2680lb per tire. I think this is overkill unless you have one of the newer trailers that tops out at over 8000lbs. If you are less than 8000lbs you should be good with the 15's.

Perry
Well that's me over 8000 lbs. and confused. The dealer tells me to go with the LTX 15" passenger car type they say the 16" true light truck tire will be too harsh.
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Old 08-30-2012, 08:12 PM   #8
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Well that's me over 8000 lbs. and confused. The dealer tells me to go with the LTX 15" passenger car type they say the 16" true light truck tire will be too harsh.
I went from a C rated tire on my SUV to an E rated tire. I run them at 45 psi and can't tell the ride difference. I plan on running my E rated Michelins on the AS at 65-70 psi. I will note tire temp with my tire monitoring system to make sure they run same as my old Carlisle D rated tires did at 60 psi..
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Old 08-30-2012, 08:21 PM   #9
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I looked at going from Marathon's to Michelin's. I could not go 16" tires due to opening allowances in the wheel wells. The 15" LT version is the one I went to after gathering info with Michelin's site and techs. Do make sure that you spec the LT version as a non LT version also exits will lighter load capacity. I also was dealing with a GVWR of just under 8000lbs. With the LT the four capacity gives 7960lbs. Besides Michelin tires have treated me well for decades on my cars and SUV's.
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Old 08-30-2012, 08:25 PM   #10
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Anyone know the performance difference between a 235 75 15 and a 235 70 16.
There are many posts about people going with the 16" Why spend the extra cash for new wheels. The 15's are the same diameter 235 mm the 16's are a little wider with a slightly shorter sidewall
Actually 235 is the width in mm, the 15 and 16 you describe are the same width. The 16 does have a shorter sidewall, as you say, described by the lower section ratio (70 vs 75 for the 15).

Top is running the 15s on his Ambassador and has thousands of trouble-free miles on them so far. Based on that and the experience of others with them, I just replaced the old load-range C Carlisles on my Argosy with a set of the Michelins. Any 3 of them will carry about 120% of my max gross rating for the Argosy, so that aspect isn't a concern.
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Old 08-30-2012, 09:10 PM   #11
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The E tires will be stiffer but you don't have to run them at 80psi. You might also find some in a D rating. You need to figure your tongue weight also. The tires only carry the total minus the tongue weight so you still maybe under 8000lbs. Get actual weights not the max GVW.

Perry

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Well that's me over 8000 lbs. and confused. The dealer tells me to go with the LTX 15" passenger car type they say the 16" true light truck tire will be too harsh.
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Old 08-30-2012, 10:33 PM   #12
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Rivet trailer tires versus truck tires

Quote:
Originally Posted by Doug C View Post
I've recently been researching tires for my 1992 25' Excella (6800 lbs GVW). I've read tons of posts and it seems like many are recommending a Michelin light truck tire in a 235-75-15.
Doug C.
Trailer tires are designed to be dragged sideways (tight turns) and sit for long periods of time, where as truck tires are not, (except for tractor trailer tires, hmmm an Airstream with 22's, nah would look funny ). Of course some folks substitute a small car battery as their house battery, same idea no workey. I know I'll get all kinds of I did it and they work fine but when you spend $800 a year to insure your truck why not drop $800 for the right tires installed that will go 5 years and keep you from careening off a mountain?
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Old 08-30-2012, 10:55 PM   #13
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Quote:
Originally Posted by Naper View Post
Anyone know the performance difference between a 235 75 15 and a 235 70 16.
There are many posts about people going with the 16" Why spend the extra cash for new wheels. The 15's are the same diameter 235 mm the 16's are a little wider with a slightly shorter sidewall
Take a look at the link to determine % difference
Tire Size Calculator - tire & wheel plus sizing
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Old 08-30-2012, 10:57 PM   #14
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Trailer tires are designed to be dragged sideways (tight turns) and sit for long periods of time
Thats why they blow out all the time. Trailer tires and substandard tires. Thats why the say "trailer use only" on them. They are not built well enough to go on a truck or car..

Why would I won't something that isn't going to stand up to being driven on my SUV to go on my trailer...??
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