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Old 12-10-2015, 09:00 PM   #15
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This new 15" Michelin tire, even with it's higher derated capacity than the current 15" Michelins, would still not be useable on our Classic where all but one of the four tires is carrying over 2,040 pounds.

But this new 15" model would be a good choice even for the 7,800 pound 27FB Eddie Bauer models. It will be a natural for our 2015 23D International Serenity in the future when it is time to retire the new 15" Michelins put on in July 2015.

I will hazard a guess that Andy at CanAm will recommend the 44 psi he suggested for our 2013 25FB International Serenity for the new tires as well. We are using 44 psi on the 23D and the Dill TPMS is showing good numbers running down the highway.
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Old 12-11-2015, 12:18 AM   #16
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Darn, still not enough capacity for our 20 FC
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Old 12-11-2015, 08:16 AM   #17
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The 14" GoodYear Marathon ST215/75R14C tire is rated 1,870 pounds @ 50 psi and is 26.7" in diameter.

The 15" GoodYear Marathon ST225/75R15D tire is rated 2,540 pounds @ 65 psi and is 28.3" in diameter.

The existing 15" Michelin LTX (P) 235/75R15 XL tire is sidewall rated 2,183 pounds @ 50 psi but has to be derated to 1,985 pounds for trailer use and is 28.9" in diameter.

The 16" Michelin LT225/75R16/E LTX M/S2 tire is rated 2,680 pounds @ 80 psi and is 29.2" in diameter.

When we switched from the stock 14" GYM tires and wheels on our 2015 23D International to the 15" Michelins mounted on 15" SenDel T03-56545T wheels (matches the 16" SenDel T03-66655T wheels on our Classic), we raised the trailer 1.1" higher off the ground and increased the load capacity 125 pounds per tire. We run the 15" Michelins at a lower pressure of 44 psi.

When we switched the stock 15" GYM tires to the 15" Michelins on the 2013 25FB International Serenity, we raised the trailer about 1/4" in height using the factory wheels. Camping ready, the 25FB had less than 5,900 pounds of axle weight. We ran the Michelins at 44 psi per CanAm recommendation.

So the 16" tire is less than an inch taller in diameter which raises the trailer just under 1/2" in overall height and also increases ground clearance by that amount. The hitch would be looking for the tow vehicle ball to also be about 1/2" higher for the trailer to sit level.

The switch to the 16" tires for the 20' single axle trailers provides a small increase in load capacity as well as a tire that has had a better service history. One can find a 1/2" taller shank for the ball on the tow vehicle without too much problem.

The left photo is a 15" GYM on the left with a 15" Michelin on the right with both mounted on the stock Airstream wheel.

The right photo is a 15" GYM on the left with a 16" Michelin on the right with both mounted on the appropriate wheels.
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Old 12-11-2015, 08:44 AM   #18
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Don't forget the MAX operating speed for ST type tires, unless specifically marked on the tire is 65mph.
65 is not an average but ever as damage to tires is cumulative and just as putting air back in a tire that has been run flat does not "fix" it, running 55 does not "fix" the damage you did by running 70 and putting the burnt hot dog back in the refrig doesn't "fix" the hot dog.
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Old 12-11-2015, 09:48 AM   #19
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Quote:
Originally Posted by Rocinante View Post
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!
I had the same experience in November. Found one of the OEM Goodyears wearing badly (curb side rear), had the "alignment" checked and was told no problem there and probably a bad tire. Decided to go with the 15" Michelin. Checked Tirerack, saw the new Defender but unavailable. Went to my local tire guy, Michelin dealer and he said same. Called Michelin and they also gave me the March 2016 timeline for availability. Not wanting to wait, went with the 15" LTX MS2 so many on the forum are using. Took 2 in at a time, mounted, balanced, metal stems, out the door for $607.76/4 plus sent in the $70 rebate (online) offered from Michelin. All four manufactured 40th week, 2015. A great deal as far as I'm concerned and kept the $$ local.
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Old 12-11-2015, 10:06 AM   #20
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Quote:
Originally Posted by KJRitchie View Post
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.

Kelvin
According to the Tire Tech page on Tirerack explaining Maximum Load, the load carrying capacity on the P-Metric XL tire is all in at 41psi. If I am interpreting that correctly, perhaps that is why it was recommended to Switz to run at 44psi. All the load carrying capacity there plus a little extra to stiffen sidewall further? On the scales, my 25FB ready to camp was just under 6000lbs. So I feel pretty good to be rid of the Marathons and have plenty of reserve load capacity with the de-rated XL Michelins. Will probably run at 45lbs unless the tire engineers jump in to say run the max inflation pressure of 50. Would have liked to try the Defender with the slightly higher load rating but wasn't willing to wait any longer while running on the Marathons!
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Old 12-11-2015, 11:11 AM   #21
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ST vs LT

Quote:
Originally Posted by switz View Post
The 14" GoodYear Marathon ST215/75R14C tire is rated 1,870 pounds @ 50 psi and is 26.7" in diameter.

The 15" GoodYear Marathon ST225/75R15D tire is rated 2,540 pounds @ 65 psi and is 28.3" in diameter.

The existing 15" Michelin LTX (P) 235/75R15 XL tire is sidewall rated 2,183 pounds @ 50 psi but has to be derated to 1,985 pounds for trailer use and is 28.9" in diameter.

The 16" Michelin LT225/75R16/E LTX M/S2 tire is rated 2,680 pounds @ 80 psi and is 29.2" in diameter.

When we switched from the stock 14" GYM tires and wheels on our 2015 23D International to the 15" Michelins mounted on 15" SenDel T03-56545T wheels (matches the 16" SenDel T03-66655T wheels on our Classic), we raised the trailer 1.1" higher off the ground and increased the load capacity 125 pounds per tire. We run the 15" Michelins at a lower pressure of 44 psi.

When we switched the stock 15" GYM tires to the 15" Michelins on the 2013 25FB International Serenity, we raised the trailer about 1/4" in height using the factory wheels. Camping ready, the 25FB had less than 5,900 pounds of axle weight. We ran the Michelins at 44 psi per CanAm recommendation.

So the 16" tire is less than an inch taller in diameter which raises the trailer just under 1/2" in overall height and also increases ground clearance by that amount. The hitch would be looking for the tow vehicle ball to also be about 1/2" higher for the trailer to sit level.

The switch to the 16" tires for the 20' single axle trailers provides a small increase in load capacity as well as a tire that has had a better service history. One can find a 1/2" taller shank for the ball on the tow vehicle without too much problem.

The left photo is a 15" GYM on the left with a 15" Michelin on the right with both mounted on the stock Airstream wheel.

The right photo is a 15" GYM on the left with a 16" Michelin on the right with both mounted on the appropriate wheels.

Hi,

We have a 28ft Intl with the 15 in. Marathon Tires, we keep them at 60 psi, so far we have driven round 24K miles with them without any problems whatsoever. We keep our speed no higher than 60 miles. My question is why we should upgrade or downgrade to LT tire that is not specifically constructed for trailer use. There is a lot of threads and literature online about ST vs LT. So, what's the deal?
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Old 12-11-2015, 01:17 PM   #22
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following this as well. Looking to add the 15" Michelin tires to my trailer here in the next 12 months. My current tires are exactly 3 years old. With 3 axles, weight shouldnt be an issue. Just curious about the performance of the LTXs.
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Old 12-11-2015, 01:53 PM   #23
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I'm following as well. I would love to have Michelins, but didn't want to have to move up to 16". I'll keep watching......
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Old 12-11-2015, 02:45 PM   #24
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Trailer Tires

A different voice ---

I took delivery of a 2016 27 FB a month or so ago. What was recommended to me was to replace the 15 inch Goodyear Marathons. What others recommended as the replacement in 1st place was Michelin XPS Ribs. The problem there is that they only come in 16 inch sizes, so to replace them means not only new tires but also new rims. Furthermore, the XPS Ribs are around $250 each, so the replacement means approx $1,000 in tires & $500 in rims = $1,500, ouch! The 2nd place replacement recommendation was 15 inch Maxxis E-load rating, I think they're the 8008. I got four of them including shipping for under $500 & replaced the Marathons with them. Time will tell if the replacement was worth the time & cost.
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Old 12-11-2015, 04:59 PM   #25
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Michelin Defender LTX M/S 235/75-15 109T XL

Quote:
Originally Posted by Makaira View Post
Hi,



We have a 28ft Intl with the 15 in. Marathon Tires, we keep them at 60 psi, so far we have driven round 24K miles with them without any problems whatsoever. We keep our speed no higher than 60 miles. My question is why we should upgrade or downgrade to LT tire that is not specifically constructed for trailer use. There is a lot of threads and literature online about ST vs LT. So, what's the deal?

There are so many threads on "the deal" about ST vs. LT that one can hardly avoid them. As the OP, I suggest we not re-hash that issue here, focusing instead on what we learn about this new Michelin tire as it hits the market next March.

Since the new tire's not out yet, all we have today is specs and speculation. My speculation is that it will be a great way for us to move from an ST tire to something else for our 27FB with 15" wheels, given our trailer seems to fit comfortably within this tire's slightly enhanced load capacity (109T on this one vs. 108T on the previous Michelin).
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Old 12-11-2015, 05:04 PM   #26
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Originally Posted by SteveSueMac View Post
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".
x2, I run the same tires at 50 pounds pressure and the ride is sooo much better than ST tires.
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Old 12-11-2015, 05:59 PM   #27
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I have a question for those who have upgraded from 15", 5-lug wheels to 16" wheels and have not upgraded the axles. Were you able to find 5-lug 16" wheels, hopefully in steel rims?

In 2011 we upgraded our '99 Safari from 14" wheels to 16", however they have 6-lugs, and we did upgrade to new axles. We are wanting to run the Michelin XPS 16" tires on another trailer without changing the axles, and am wondering about how others handled the lug situation.

Thank you for any info.

Deb
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Old 12-11-2015, 06:13 PM   #28
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Hey, Cruiser, topic police! Please ask that question in a different thread. Meanwhile, BoldAdventure and MHoney both posted very detailed information on that topic earlier in the year. Search and ye shall find.
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