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Old 12-10-2015, 10:49 AM   #1
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Michelin Defender LTX M/S 235/75-15 109T XL

Posting to ask about a "new" 15- inch tire from Michelin that looks quite promising. It is the Michelin Defender LTX M/S P235/75-15 109T XL.

Caveat: I don't know that it's actually a new tire, but I've not seen it before and a search of Airforums threads on this tire comes up empty.

This one has the same "T" speed rating as the Michelin LTX MS/2 P235/75-15 108T XL. Key difference seems to be that the Defender 109T is rated at 2271 lb, vs. the MS/2 108T, which is rated at 2205. So, after the 10% de-rating exercise the new tire comes in at 2044, which gives a bit more buffer.

Anyway, it looks promising. Anybody out there already running this tire? Would love to hear your thoughts.
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Old 12-10-2015, 11:05 AM   #2
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I believe this is a relatively new tire, and have heard that is it the eventual replacement for the LTX M/S2....kind of like there was an overlap of availability of the LTX M/S and the LTX M/S2. Not sure if anyone here has tried the Defender, but I think the differences are a non- issue, other than a bit of load improvement.
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Old 12-10-2015, 11:25 AM   #3
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Thanks, Rich.

We're thinking the same thing - it seems mostly the same tire with a slightly higher load capacity. This may be exactly what we need in a 15" tire for our 27FB. Nobody local has this tire in stock, but they all say we can special order. When we're ready to replace our GYMs, we'd love go this way vs. up-sizing to 16" wheels.
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Old 12-10-2015, 11:33 AM   #4
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What I don't like about these 15" tires (I have the Michelin MS2) is to get max load you have to run them at maximum 50lbs pressure while the 16" tires you can safely run them from 65lbs to 80lbs and get adequate load. But then its cheaper not to have to mess with purchasing new rims.

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Old 12-10-2015, 11:35 AM   #5
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Kelvin - what problems do you see at 50 PSI? We use the Michelin 15s at that PSI and have no problems at all. In fact, I wouldn't dare run them lower for fear of overheating them or losing my "capacity cushion".
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Old 12-10-2015, 12:36 PM   #6
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With Michelin, at least, I have found no noticeable difference in ride or trailer treatment between 70 psi, 75psi or 80psi. I have 16" LTX M/S and have settled in at 80psi. I would have to believe the Defender will have similar non-harshness at full pressure.....but that's a supposition on my part. I had 15" LTX M/S2 XLs on my van (sold today!) and there was no noticeable difference either, between full pressure and something lower.
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Old 12-10-2015, 12:44 PM   #7
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Just got off the phone with Michelin, because I could not find this particular tire on their website. It's on Tire Rack, Discount Tire, etc., but not theirs.

Turns out this tire is scheduled to be available in March of 2016. That must also be why it shows as a "special order" item for most retailers.

So, I guess we'll hang tight until March!
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Old 12-10-2015, 01:19 PM   #8
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Quote:
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Kelvin - what problems do you see at 50 PSI? We use the Michelin 15s at that PSI and have no problems at all. In fact, I wouldn't dare run them lower for fear of overheating them or losing my "capacity cushion".
You just have to be more vigilante in checking the tire pressure. I use a TireTraker TPMS system which gives me some piece of mind. I also carry a Viair pump. The 16"s are just a little more forgiving in load cushion in case you had a slow leak and you had to travel some miles to get a repair.

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Old 12-10-2015, 05:38 PM   #9
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I'm not sure these are really Light Truck Tires; the information available now is not consistent. The manufacturers are not clearly delineating light truck tires from passnger tires rated for light truck service. Michelin calls them LTX MS2, but one site say they are available in p-metric and lt-metric sizes, another uses different terminology. Tire rack says they are Service 109T, Michelin says 108T. Both say that the load range is XL. According to Tire Rack, load range XL is a p-metric description. If the tire were LT-metric, the load range would be C, D, E, etc. The issue, to me, is that by FMVSS, the load bearing capacity of P-metric tires used on a truck or trailer must be de-rated 10%. 2271# /1.1 = 2064# which is 75# more than the current P225/75-15 LT tire.
If they had been available a year ago, I might have bought them instead of upgrading to 16's. But then my trailer only grosses to 6300#. On a 7800# 27' trailer, maybe not.

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Old 12-10-2015, 05:42 PM   #10
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Rocinante,
I looked online at tire rack this morning. 128.20 but on backorder. I also find these intriguing since I'd like to switch from GYMS but wasn't excited about switching to 16s. 27FB axles rated @ 3900, these tires look promising. I'm sure that someone will beat me to them...
That's okay, please share with the rest of us. Thanks. ..
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Old 12-10-2015, 06:01 PM   #11
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I have a 2002 31 Classic that has a five year old set of 15 inch Michelin LTX M/S 2. The tires are starting to show their age so before I head back to Ottawa from Florida I want to change out the tires. This isnt about the lower cost of the tires in the states. Just look at the exchange rate! We are thinking about a new or newer A/S in the next couple of years so I really dont want to put 16 inch tires on and then trade it in if I dont have to. Based upon the spotless history on these 15 inchers on the trailer over many thousands of miles, I would like to hold off untill these new tires become available. We typically pack light and run all tanks dry while towing. These tires do have a greater margin of safety so I think that I will hold off until we head back home and see if I can get a set. Any constructive thoughts would be appreciated. Thanks Pete
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Old 12-10-2015, 07:09 PM   #12
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This discussion is way too positive for an AS tire thread. What is wrong with this tire?
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Old 12-10-2015, 08:08 PM   #13
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Old 12-10-2015, 08:23 PM   #14
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This discussion is way too positive for an AS tire thread. What is wrong with this tire?

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