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Old 11-20-2011, 07:27 PM   #15
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Our mpg will be out of warranty in two weeks. Before we take off on our summer travels I will replace the two Chinese tires with better ones. With a gross weight of 3800 pounds, nearly any tire will theoretically handle the weight. However, I'm a firm believer in margins, so I'll look for tires that can handle 4000 pounds each. That will also mean, I think, that I won't be running them at the maximum pressure, so there should be a slight ride benefit, although that might be offset by stiffer tires.

Now, what should I get? I generally prefer buying American, but I'm not adverse to an imported tire IF it is greatly superior to the American one.
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Old 11-20-2011, 07:38 PM   #16
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Originally Posted by kb0zke View Post
Our mpg will be out of warranty in two weeks. Before we take off on our summer travels I will replace the two Chinese tires with better ones. With a gross weight of 3800 pounds, nearly any tire will theoretically handle the weight. However, I'm a firm believer in margins, so I'll look for tires that can handle 4000 pounds each. That will also mean, I think, that I won't be running them at the maximum pressure, so there should be a slight ride benefit, although that might be offset by stiffer tires.

Now, what should I get? I generally prefer buying American, but I'm not adverse to an imported tire IF it is greatly superior to the American one.

Most ST tires are not made in the US. I think there is a case that can be made in your situation that goes into the overkill realm. Two 4000 pound rated tires for a trailer that has a gross of 3800 pounds is more cushion than needed. You also need to be sure any wheel you have can handle the pressures and that the tire won't function worse than a tire that has a 2800-3000 rating would. I would look for tires that can handle 2800 pounds and realize that about 500 pounds of the 3800 pounds is accommodated by the tongue, leaving around 3300 pounds on the axle. So how much axle rating capacity do you have and then match tire to that and a little more. Then go weigh the trailer to see where you are both total weight and axle capacity. Good luck.
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Old 11-20-2011, 10:44 PM   #17
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I tried about 5 brands of 15" "ST" tires and they all blew or separated. Even "E" load range "ST" tires failed. I switched to 16" "LT" tires and never had another trailer tire problem.
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Old 11-21-2011, 11:22 AM   #18
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I tried about 5 brands of 15" "ST" tires and they all blew or separated. Even "E" load range "ST" tires failed. I switched to 16" "LT" tires and never had another trailer tire problem.

Out local Les Schwab Tire center strongly suggests replacing ST tires with ST tires, perhaps the next higher rated capacity. I mentioned LT tires and they were ambivalent about that option. They maintain that ST tires are designed for and perform better on trailers, an opinion that is not universally embraced on most RV forums.
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Old 11-21-2011, 11:39 AM   #19
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Schwab has everything to gain by suggesting ST tires. I was once told that LT tires don't dissipate the heat as well as ST tires. They do dissipate the air and rubber quite well though. ST tires are only rated for 65 MPH. The Yokohama LT tires myself and all my friends put on their trailers solved the ST tire problems.
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Old 11-21-2011, 12:13 PM   #20
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There is no one smarter than all of us together. I wonder if the tech at LS had any actual experience towing a trailer behind a MH.

I went with ST tires on my 20' enclosed, but only because of the cost difference and my weight/tire is over 1500 lbs below sidewall rating/tire. If one goes or separates, they are all coming off and 15" LTs are going on.
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Old 11-21-2011, 04:44 PM   #21
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There are 4 major causes of tire blowouts.

1: Road hazard (of course) and yes, this can cause the type of failure you cite though I think it would be a bit rare if those are duals, if they are singles then very possible.

2: AGE: and strangley 5 years is the "Start to worry about it" age for tires.. epically if the vehicle sits a lot... My six year old Mitchlins still appear new (no cracking evident) but I drive at least 2x a month and a good number of miles when I drive.

3: Overload, this is epically true on trailer tires. however if they have been there for five years... I doubt this.

4: Small wheels and 55 mph.. See 3

In my trailer days both the PUP and the solid trailer were "Small wheel" types. I was able to upgrade the tire and rim by one size and ... Well, this more or less put an end to the pop-a-matic nature of the tires.. In fact I have had only 3 flats since then on the traier.

1: AGE, they were closer to 10 or 12, Trailer was empty (Towing it to the dealer to trade it in on the current batch of Mitchlins)

2: Valve stem failure (also due to age, older than #1), Tire still good

3: Pot hole.
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Old 11-21-2011, 05:18 PM   #22
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Maxxis brand tires are worth looking into. Do your own research and decide for yourself.
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Old 11-21-2011, 09:04 PM   #23
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"When it comes to knowing the fully loaded weight of their rigs, trailer owners were more likely to know their weight (75%) than motorhome owners (65%)."

I seriously doubt these %ages are that high...probably many of the respondents have their head in the sand on this, and say 'they know' because they read the brochure.

Just my opinion.

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