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Old 11-19-2015, 06:18 PM   #29
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Those of us that have sustained major wheel well damage from the blankety-blank Marathons are more that a bit gun shy running them. Enough said.

You know it's bad when you are trailing smoke, plumbing parts, and torn aluminum from one tire blowing out. Won't give them a second chance to kill me.


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Old 11-19-2015, 06:34 PM   #30
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Just a thought here - but couldn't ANY radial (included Michelins) destroy our trailers if shredded on a blowout? Maybe we should be thinking about bias ply trailer tires???
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Old 11-19-2015, 06:49 PM   #31
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Realistically a blown tire of any sort is bad news. The idea is not to run tires that have a propensity to have sudden failures like the GYMs.

I have never had any issues with Michelin tires, but lots with Firestone and Goodyear over the years on assorted vehicles.

The worst issue I ever had was a severely weather checked Michelin that developed a slow leak at the start of a trip. The tire was 10 years old and was stored in the high desert in California. Not unexpected. No blowout, either. Bought s new set and headed out.


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Old 11-20-2015, 03:58 AM   #32
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While your trailer should be insured against damage, a major tire incident is not a freebee. The deductable has to be paid along with all the expenses associated with getting the trailer to a repair location and the loss of personal time dealing with the situation. Not every Airstream dealer has a factory trained metal smith.

Unless one gets under the trailer to see the other side of the tire to check for abnormal bulges or cracks and moves the trailer a few feet after the initial visual inspection to see the part of the tread that was in contact with the pavement at first, a thorough inspection was not done.

My experience with the GYM tires was air pressure went down in less than two weeks of storage. My Michelins maintain pressure for months while the trailer is stored.

So checking the GYM tire pressure every morning while the tires are cool with a precision digital tire gage and having an air compressor along to top up the pressure to 65 psi would be prudent while maintaining a speed at 65 mph or lower on hot days like in the Southwest in the summer.

When buying a new trailer that has been on the dealer's lot a long time (check the data tag on the street side front of the trailer for the build year and month), also check the tire manufacture date which is a four digit number (week-week-year-year). If the tires are already a year old, see if part of the deal can be new tires. Folks here have strongly suggested a three year from date of manufacture life cycle for the GYM tires.
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Old 11-20-2015, 05:47 AM   #33
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Old 11-20-2015, 06:32 AM   #34
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Did not the post the wrong info. The law says the tire has to derated about 10% when installed on a trailer. An 8092 lb rating drops to about 7300 lbs or about 200 lbs per tire. Realistically a 8092 lb SUV weighs the same as an 8092 lb Airstream!!! I do not believe there is any Airstream where P235/75R15s would be overloaded!!!
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Old 11-20-2015, 06:59 AM   #35
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Typical P235/75x15 tire maximum load is 2,183, which equals 1,984.5 pounds (derated 10%).

Late model 19-foot, single-axle Bambi's can weigh 4,500 pounds, which is 2,250 per tire, resulting in an overload condition. Even subtracting 450 pounds as tongue weight, the weight on tires would be 4,050 pounds, or 2,025 per tire -- still overloaded.

I personally would not run these passenger car tires on my single axle Airstream.
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Old 11-20-2015, 10:49 AM   #36
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Quote:
Originally Posted by mykytiukr View Post
Did not the post the wrong info. The law says the tire has to derated about 10% when installed on a trailer. An 8092 lb rating drops to about 7300 lbs or about 200 lbs per tire. Realistically a 8092 lb SUV weighs the same as an 8092 lb Airstream!!! I do not believe there is any Airstream where P235/75R15s would be overloaded!!!
Dear 2 post new guy, welcome to Airforums. Thank you for schooling us all in your first two posts.

See:

Quote:
Originally Posted by Phoenix View Post
Typical P235/75x15 tire maximum load is 2,183, which equals 1,984.5 pounds (derated 10%).

Late model 19-foot, single-axle Bambi's can weigh 4,500 pounds, which is 2,250 per tire, resulting in an overload condition. Even subtracting 450 pounds as tongue weight, the weight on tires would be 4,050 pounds, or 2,025 per tire -- still overloaded.

I personally would not run these passenger car tires on my single axle Airstream.
End of that discussion.

Quote:
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My experience with the GYM tires was air pressure went down in less than two weeks of storage. My Michelins maintain pressure for months while the trailer is stored.
I check our tires before ever move. And usually at intervals during a trip from one place to another. I have noticed that the Michelins maintain pressure for a long time even on the road full time.
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Old 11-20-2015, 10:56 AM   #37
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As I mentioned earlier, the axles on our 2014 Classic are carrying 8,062 pounds when loaded for camping.

The individual tire loads are:

Curb front: 2,042 pounds
Curb rear: 2,062 pounds
Street front: 2,034 pounds
Street rear: 1,921 pounds

Thus three of our four tires would exceed the allowable derated weight capacity of 1,985 pounds for the 15" Michelins.

Oddly enough, the 34' Classics with three axles and six tires would work with the 15" Michelins.
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Old 11-20-2015, 10:58 AM   #38
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C'mon Bold - that's not very welcoming. I've posted some incorrect stuff too and appreciated the way people helped me understand...

Switz has it right. You have less than 4000# with those derated Michelin P 15" tires on a single axle trailer. That's not enough for that application. For a double axle coming in under 7000#, they are a valid choice.
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Old 11-20-2015, 12:20 PM   #39
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Finally, I get it! So 15in Michelins are good to 7180lbs. 16s if you're fatter than that....
I'm on the bubble . Okay for short trips, which is most of the time. But,
On a long trip, I could be too close for comfort. So it's 16s, or Maxxis, every 3 years.
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Old 11-20-2015, 01:03 PM   #40
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C'mon Bold - that's not very welcoming. I've posted some incorrect stuff too and appreciated the way people helped me understand...

Switz has it right. You have less than 4000# with those derated Michelin P 15" tires on a single axle trailer. That's not enough for that application. For a double axle coming in under 7000#, they are a valid choice.
I know it wasn't very friendly.

It's that weight per tire that made me nervous. And the fact weight shifts around. We know two other full-time families on the road with 27's running those tires. It would just make me nervous. That's cutting it really close.

I use the printed Michelin load tables to inflate our Airstream-based on my cat scale weight.
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Old 11-20-2015, 01:16 PM   #41
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I know it wasn't very friendly.



It's that weight per tire that made me nervous. And the fact weight shifts around. We know two other full-time families on the road with 27's running those tires. It would just make me nervous. That's cutting it really close.



I use the printed Michelin load tables to inflate our Airstream-based on my cat scale weight.

Yup.

Hey - you may want to check with our resident "tire guys" - seems I recall their recommendation was to always go to full tire PSI - I can't recall if that was ST only or all tires used on trailers including LT. If you're adjusting by weight table you're probably under 80 psi but might want to change that (unless I'm wrong which happens from time to time &#128530
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Old 11-20-2015, 04:59 PM   #42
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Quote:
Originally Posted by switz View Post
As I mentioned earlier, the axles on our 2014 Classic are carrying 8,062 pounds when loaded for camping.

The individual tire loads are:

Curb front: 2,042 pounds
Curb rear: 2,062 pounds
Street front: 2,034 pounds
Street rear: 1,921 pounds

Thus three of our four tires would exceed the allowable derated weight capacity of 1,985 pounds for the 15" Michelins.

Oddly enough, the 34' Classics with three axles and six tires would work with the 15" Michelins.
Looks like the new replacement for the Michelin would work? The defender?
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