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Old 09-03-2014, 12:32 PM   #43
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Goodyear tires. Keep or replace

Discount Tire recommended Michelin LTX MS2 225/75R16 tires with the rims to match the larger tire size. What is the downside to the larger tire? We have a 2011 FB Flying Cloud.
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Old 09-04-2014, 08:12 AM   #44
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Discount Tire recommended Michelin LTX MS2 225/75R16 tires with the rims to match the larger tire size. What is the downside to the larger tire? We have a 2011 FB Flying Cloud.
Wiske, We have a 2014 27' Eddie Bauer (basically the same trailer as you have) and ours came from the factory with the tires that Discount Tire is recommending so it looks like you are getting good advice.

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Old 09-04-2014, 11:32 AM   #45
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The Michelin LT225/75R16/E LTX M/S2 tires and SenDel T03-66655T wheels are standard on the 2015 31' Classic. They should have been installing them a long time ago with the Classic's GVW of 10,000 pounds. These Michelin tires are rated 2,680 pounds at 80psi and are not speed limited like the the GoodYear Marathons that are rated 2,540 pounds at 65psi and a speed limited to 65mph per their sidewall. The Michelins are 29.2" in diameter while the GoodYears are 28.3" tall. Thus the trailer will have just under " more ground clearance.

The tire you want is Michelin part number #05681. Five cost me around $1,188 mounted on my rims at CostCo. They may be in short supply due to the recall for an issue on a prior model that is being replaced with the current version.
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Old 09-05-2014, 10:04 AM   #46
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Great advice. We have gone ahead and replaced the Goodyears with the Michelin 16". Thanks!
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Old 09-05-2014, 11:01 AM   #47
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I agree the Marathons should be replaced but did moving from a D load range to an E cause a harsher ride? I'm worried about the rougher ride causing damage. I moved from Marathon D's to Maxxis E's on an SOB and it definitely made the ride rough. Drawers were open and stuff inside moved around during travel.
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Old 09-05-2014, 11:36 AM   #48
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I agree the Marathons should be replaced but did moving from a D load range to an E cause a harsher ride? I'm worried about the rougher ride causing damage. I moved from Marathon D's to Maxxis E's on an SOB and it definitely made the ride rough. Drawers were open and stuff inside moved around during travel.
I think it does cause a rougher ride. I know a similar change on our 1/2 ton truck did. So it's a tradeoff of reliability and gentle ride.

We have the 16" Michelins and I am looking for a tire pressure to mitigate some of it. Airstream recommends 80 psi. Less pressure may mean more sidewall flex resulting in reduced sway resistance and higher tire temperatures.

There are mile-long threads on this without a clear answer. I'm thinking of 70 to 75 psi for our 25' FC, the lower psi when expecting rougher road surfaces (most concrete interstates). We tend to avoid hot weather travel.

I think speed matters as well, rougher roads using lower pressure and lower speed ranging 55-65 mph.
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Old 09-05-2014, 05:24 PM   #49
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We run our Michelins LT tires at 55 psi and have never observed the tire temperature gain over the ambient temperature to be more than ten degrees (our TPMS has a temperature reporting feature.)
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Old 09-05-2014, 06:46 PM   #50
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55psi in an 80psi tire is a significant reduction in load carrying capacity. That would worry me.
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Old 09-06-2014, 08:37 AM   #51
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55psi in an 80psi tire is a significant reduction in load carrying capacity. That would worry me.
80 psi is the maximum pressure that the Michelin tire can handle based on their maximum load capacity which in the case of my Michelin LT tires is 2,680 pounds per tire. With four tires and 885 pounds of weight on the tongue, at 80 psi my four tires can theoretically handle a trailer that weighs 11,605 pounds. The 80 psi figure is not necessarily a recommended psi from Airstream or Michelin it is the maximum based on the tires maximum load capacity. My trailer's maximum weight (including all cargo) is 7,800 pounds. Subtract the 885 pounds for the tongue weight from the maximum trailer weight leaves about 6,915 pounds for the four tires or 1,730 pounds per tire. According to Michelin's Load and Inflation tables, with this amount of weight on each tire, I could run my tires at 45 psi. I've chosen to run them at 55 psi instead as a cushion since I have not weighed the trailer (still highly likely to be below the 7,800 pound maximum) and also to account for some uneven trailer loading.

Below is a link to Michelin's tire pressure recommendations based on the cargo weight on each tire. There are lots of other threads on this Forum that discuss this issue. Use the search function to find them.

Why run the tires at less than the maximum pressure? Mostly to make a softer ride for the trailer to minimize damage from road travel. You could run your tires at the 80 psi maximum pressure and the towing would be perfectly safe, but the trailer will suffer over the long run.

I have tire pressure monitors on my trailer tires that also display the tire temperature. At 55 psi I have never seen my tire temperatures exceed the ambient air temperature by more than 10 degrees (even when towing at 65 mph.) Since hot tires are a good indicator of under-inflation, I consider this observation to be further validation of the safety of running my tires at 55 psi. The temperature at which most tires can be expected to fail is something north of 150 degrees.

Here is the link to Michelin's tire pressure tables:

Michelin North America RV Load & Inflation Tables
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Old 09-06-2014, 09:12 AM   #52
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55psi in an 80psi tire is a significant reduction in load carrying capacity. That would worry me.
My South Wind MH came with Michelins. I found that at 80 lbs the ride was beating me and the MH to death.

I ended up running the front tires at 65 lbs and the rear duals at 60 lbs. Made for a much more comfortable ride and still had enough LCC.
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Old 09-06-2014, 09:21 AM   #53
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The placard on the Eddie Bauer Airstream (which comes with 16" Michelins) recommends 80 psi, and the Airstream Service Center at the factory inflated mine to 80 psi and stated that was correct when I was there. I believe Airstream does recommend 80 psi for these tires.

But I am uncomfortable thinking of the rough ride our Airstream is getting from this pressure so am using less, but not 55 psi. Mostly because I am concerned about a loss of sidewall stiffness and side roll resistance, especially in an emergency maneuver.
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Old 09-06-2014, 09:56 AM   #54
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My first 19' trailer bought used was 3 years old and the OP said he ran the GYM's at 50lbs for a softer ride. I filled them back up to 63-65. They lasted another year before one tire let loose and went flat. The tire rim bead had busted loose and let the air out. Tire shop said tire was fine but all of the flexing on the sidewall when being run at 50psi had stressed the sides causing it to lose the seal.

I wouldn't advise anyone to run any tire more than 5lbs under max based on that experience. Plus I have found that a tire will run much hotter when not inflated properly. Perhaps that is why some are experiencing tire failures with ST tires.
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Old 09-06-2014, 07:34 PM   #55
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The placard on the Eddie Bauer Airstream (which comes with 16" Michelins) recommends 80 psi, and the Airstream Service Center at the factory inflated mine to 80 psi and stated that was correct when I was there. I believe Airstream does recommend 80 psi for these tires.

But I am uncomfortable thinking of the rough ride our Airstream is getting from this pressure so am using less, but not 55 psi. Mostly because I am concerned about a loss of sidewall stiffness and side roll resistance, especially in an emergency maneuver.
I can certainly understand your reluctance to deviate from Airstream's tire pressure recommendations. But the "safe recommendation" (i.e., "no brainer") is to fill the tire to their maximum pressure no matter the impact on the trailer, especially if you want to guard against the manufacturer's liability due to someone overloading their tires. On the other hand, Michelin is quite clear on its tire pressure web site (link in a previous post) that the 16" LT tire on my Eddie Bauer can be run as low as 35 psi depending on the loaded weight on each tire. As I indicated earlier, at 55 psi, I have never observed my tire temperatures to exceed the ambient air temperature by more than 10 degrees. That's a pretty good indication that my tires are operating as designed.
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Old 09-06-2014, 08:20 PM   #56
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It looks like the table is for XPS RIB "RV" tires or can you assume its valid for all LT tires? Don't get me wrong. I'm looking to replace the GYM but i don't want a harsh ride.
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