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Old 05-15-2015, 08:59 AM   #11
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"This tells me what I had already had guessed - a dual axle installation is much harder on tires than a single axle."

I don't think "harder" is speculating correctly here. Although I pull in the 12.5K plus category ... I've never worn out any tandem axle tires in over 20 years of RVing. I seldom go over 5 years on tires. Not because of wear, but because of carcas lifespan.
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Old 05-16-2015, 09:15 PM   #12
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"This tells me what I had already had guessed - a dual axle installation is much harder on tires than a single axle."

I don't think "harder" is speculating correctly here. Although I pull in the 12.5K plus category ... I've never worn out any tandem axle tires in over 20 years of RVing. I seldom go over 5 years on tires. Not because of wear, but because of carcas lifespan.
Are there plenty of tandem axle RVs that don't have tire failures? Sure. But there are still a disturbing number of catastrophic tire failures being reported on various forums. And I stand by my conclusion that the squirming and side-ways rolling of the tire that is more prevalent in tandem (dual) axle configurations is a common failure mode for trailer tires. Otherwise, the manufacturer wouldn't derate his tires by 11% for a dual axle installation.

The obvious other conclusion is that running tires at less than 90% of load capacity is a good thing, apparently significantly decreasing risk of failure.

Fred W
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Old 05-16-2015, 09:31 PM   #13
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Well I can say last year when servicing bearings on my 06 5r I accidentally spotted an issue in between the tread on one of these very tires. Looking closer I saw hairline cracks all the way around the tire and between all tread gaps. There was no sign of a problem when I looked from the side of the tires. Worse yet I looked at the others and all 4 had cracks. Went to DISCOUNT TIRE and replaced them all. Scary with 6000+ lbs riding on them.
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Old 05-16-2015, 09:43 PM   #14
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These tires are the only D rated tires (65 psi max) I've ever seen for a 13" wheel. I just put them on my trailer. Even if you think these tires are Chinese cheapies, I don't know of any alternative.

I'd like to here how these tires have worked for everybody. Post up how long you've had them, how many miles if known, and if you've had any issues.

Just fyi for those that don't know, blowouts tear up the floor of your trailer and do a lot of damage, so good tires are really important.
I agree. You do not usually see D rated tires in a 13" rim. Heck. I would have a hard time finding D rated for a 14".
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Old 05-16-2015, 09:47 PM   #15
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MSLA I think you read the chart wrong; tires are de-rated when used in dual wheel applications (like 1 ton trucks) not dual axles.
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Old 05-16-2015, 09:58 PM   #16
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We had Load Stars on our old pop up. Never had a problem or complaint. Bought it with them and sold it with the same tires 6 years later.
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Old 05-16-2015, 10:19 PM   #17
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MSLA I think you read the chart wrong; tires are de-rated when used in dual wheel applications (like 1 ton trucks) not dual axles.
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Old 05-17-2015, 06:45 AM   #18
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MSLA I think you read the chart wrong; tires are de-rated when used in dual wheel applications (like 1 ton trucks) not dual axles.

Thanks....but wasn't me that said that. I never knew they were de-rated for any reason so I plead ignorance.

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Old 05-17-2015, 09:40 AM   #19
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It was me. Printed on the sidewall (among other warnings and ply makeup) of my 2014 Rockwood A122 OEM tires:

Westlake
ST185/80R13 Load Range D
max load single axle 1710 lbs at 65 PSI
max load dual axle 1520 lbs at 65 PSI

I was surprised when I read all the fine print on the sidewall. I was also surprised that I could not find another brand of same size trailer tire in load range D on-line at any of the popular sites.

Fred W
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Old 05-17-2015, 03:35 PM   #20
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MSLA I think you read the chart wrong; tires are de-rated when used in dual wheel applications (like 1 ton trucks) not dual axles.
Who would put trailer tires sized for a pop up on a dually truck?
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