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Old 08-21-2020, 01:15 PM   #101
whutfles
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Maybe that's why you haven't had a problem - you didn't baby them. Maybe regular trips down the road is better for them than sitting in one spot? We used to have a Starcraft Folddown back in the 1970-1980's. We'd take a 2-3 week summer trip in it and then it sat in the garage for 11 1/2 months. We'd throw the entire tread cap off of each tire in the first 1000 miles the following year. It may have been because the tires developed a flat spot sitting that long.
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Old 08-22-2020, 10:23 AM   #102
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Originally Posted by Hornet28 View Post
I can only speak of my own experience with the GY Endurance. I have somewhere close to 10K on mine without any problems. Last year we did a 7600 mile 33 day trip to the PNW with a couple of 800 mi days thrown in, so they haven't been babied
I don't think the issue is with the lighter fifth wheels, the subject is like the OP's fifth wheel.

You have an older fifth wheel with 6K axles I would think ?? Probably what 12-13K GVWR. Not a fifth wheel thats nearing 17K GVWR.
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Old 08-22-2020, 12:09 PM   #103
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Originally Posted by PSFORD99 View Post
I don't think the issue is with the lighter fifth wheels, the subject is like the OP's fifth wheel.

You have an older fifth wheel with 6K axles I would think ?? Probably what 12-13K GVWR. Not a fifth wheel thats nearing 17K GVWR.
A little Saturday morning research.

According to the figures in the Keystone brochure for the year and model in the OP description, indicates it has 5000# axles.

If Keystone stuck firm to their tire fitment policies for that time frame, the OE tires would have been ST225/75R15D. If the OP is using ST225/75R15E tires they provide more load capacity than the minimum recommendation by RVIA for newer RV trailer tires.

All RV trailer OE tires are required to have a load capacity equal to or greater than the trailer's certified GAWRs. For newer trailers the RVIA load capacity reserves will add 10% load capacity above the certified GAWRs.

Tire industry standards require any replacement tires to have a load capacity equal to or greater than the OE tires provided, via inflation pressures.

That's the way it's supposed to work. Any selections with less than those minimum requirements are a safety violation. With few exceptions, replacement tires with a designated size that differs from the OE tire designated size is a misapplication.

https://www.keystonerv.com/media/104...ochure.pdf.pdf
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Old 08-22-2020, 01:05 PM   #104
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Originally Posted by CalandLinda View Post
A little Saturday morning research.

According to the figures in the Keystone brochure for the year and model in the OP description, indicates it has 5000# axles.

If Keystone stuck firm to their tire fitment policies for that time frame, the OE tires would have been ST225/75R15D. If the OP is using ST225/75R15E tires they provide more load capacity than the minimum recommendation by RVIA for newer RV trailer tires.

All RV trailer OE tires are required to have a load capacity equal to or greater than the trailer's certified GAWRs. For newer trailers the RVIA load capacity reserves will add 10% load capacity above the certified GAWRs.

Tire industry standards require any replacement tires to have a load capacity equal to or greater than the OE tires provided, via inflation pressures.

That's the way it's supposed to work. Any selections with less than those minimum requirements are a safety violation. With few exceptions, replacement tires with a designated size that differs from the OE tire designated size is a misapplication.

https://www.keystonerv.com/media/104...ochure.pdf.pdf
Now I'm thoroughly confused. In the OP opening post he States a 2018 unit with 16 in tires
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Old 08-22-2020, 01:30 PM   #105
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Everybody ought to use whatever tire they wish or whatever their buddy uses and if it takes the side off their camper maybe their buddy will help them fix it.
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Old 08-22-2020, 01:48 PM   #106
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Now I'm thoroughly confused. In the OP opening post he States a 2018 unit with 16 in tires
Sorry. I was answering PSFORD99's post that was referring to a post by HORNET28.
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Old 08-23-2020, 10:21 AM   #107
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Originally Posted by CalandLinda View Post
A little Saturday morning research.

According to the figures in the Keystone brochure for the year and model in the OP description, indicates it has 5000# axles.

If Keystone stuck firm to their tire fitment policies for that time frame, the OE tires would have been ST225/75R15D. If the OP is using ST225/75R15E tires they provide more load capacity than the minimum recommendation by RVIA for newer RV trailer tires.

All RV trailer OE tires are required to have a load capacity equal to or greater than the trailer's certified GAWRs. For newer trailers the RVIA load capacity reserves will add 10% load capacity above the certified GAWRs.

Tire industry standards require any replacement tires to have a load capacity equal to or greater than the OE tires provided, via inflation pressures.

That's the way it's supposed to work. Any selections with less than those minimum requirements are a safety violation. With few exceptions, replacement tires with a designated size that differs from the OE tire designated size is a misapplication.

https://www.keystonerv.com/media/104...ochure.pdf.pdf

Which fifth wheel are you referring too. The OP has a 2018 358BH Montana High Country . I too am little confused about what fifth wheel we are talking about .
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Old 08-23-2020, 10:59 AM   #108
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Which fifth wheel are you referring too. The OP has a 2018 358BH Montana High Country . I too am little confused about what fifth wheel we are talking about .
Hornets, the one in the reference.
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Old 08-23-2020, 11:08 AM   #109
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Hornets, the one in the reference.
The confusion was you said OP , Hornet is not the OP.

The point was he is not comparing anywhere close to what the weigh involved with the OP, as said the Endurance does not belong in this discussion . Comparing two totally different weights ,and fifth wheels .
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Old 08-23-2020, 03:15 PM   #110
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The confusion was you said OP , Hornet is not the OP.

The point was he is not comparing anywhere close to what the weigh involved with the OP, as said the Endurance does not belong in this discussion . Comparing two totally different weights ,and fifth wheels .
Just a misread. When you misquoted most of the information about HORNET28s trailer I went and found a reference for his trailer. I should have referenced it as HORNET28 instead of OP.

The original OP (MIKEFF) changed his subject from trailer to truck. His replacement tire selection for his trailer is still a mystery. He never established the use of his GY Endurance tires. IMO his trailer may have been equipped with ST235/80R16 LRE tires with a maximum load capacity of 3520# at 80 PSI. The GY endurance of the same designated size provides a maximum load capacity of 3420# at 80 PSI. Therefore they do not qualify as replacements.
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Old 08-23-2020, 04:24 PM   #111
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Originally Posted by CalandLinda View Post
Just a misread. When you misquoted most of the information about HORNET28s trailer I went and found a reference for his trailer. I should have referenced it as HORNET28 instead of OP.

The original OP (MIKEFF) changed his subject from trailer to truck. His replacement tire selection for his trailer is still a mystery. He never established the use of his GY Endurance tires. IMO his trailer may have been equipped with ST235/80R16 LRE tires with a maximum load capacity of 3520# at 80 PSI. The GY endurance of the same designated size provides a maximum load capacity of 3420# at 80 PSI. Therefore they do not qualify as replacements.
Without reading all the posts again, the OP originally replaced all of his tires with the endurance. Many of us suggested they're not up to the task of a heavy 5er. He has since removed them and replaced them with the Sailun s637 G-rated 14 ply tires
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Old 08-23-2020, 04:57 PM   #112
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Without reading all the posts again, the OP originally replaced all of his tires with the endurance. Many of us suggested they're not up to the task of a heavy 5er. He has since removed them and replaced them with the Sailun s637 G-rated 14 ply tires
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I'm all done with this one.
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Old 08-24-2020, 12:39 PM   #113
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Originally Posted by CalandLinda View Post
Just a misread. When you misquoted most of the information about HORNET28s trailer I went and found a reference for his trailer. I should have referenced it as HORNET28 instead of OP.

The original OP (MIKEFF) changed his subject from trailer to truck. His replacement tire selection for his trailer is still a mystery. He never established the use of his GY Endurance tires. IMO his trailer may have been equipped with ST235/80R16 LRE tires with a maximum load capacity of 3520# at 80 PSI. The GY endurance of the same designated size provides a maximum load capacity of 3420# at 80 PSI. Therefore they do not qualify as replacements.
If your thought of his trailer coming with max tire capacity of 3520# is correct then if he'd gone to the Endurance 235/85x16 the capacity would've been 3640# which is what I'm running on mine. I do agree that load capacity should be at least matched with the GVWR of the trailer and better to exceed it.
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Old 08-24-2020, 02:26 PM   #114
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In accordance with RV trailer regulations, the minimum load capacity for the Original Equipment tires MUST equal or be greater (via inflation) than the vehicle certified GAWR (s). Therefore, all replacement tires MUST have a load capacity equal to or greater than what the OE tires provided.

Your Keystone owner’s manual will tell owners to look at the vehicle certification label for the required tire load capacity. It further informs the owner to look at the maximum load capacity of the OE tires to verify their maximum load capacity. That owner’s manual information is mandated by NHTSA to be included in the manual.

Many RV trailer owners read broad RV information sheets. Motorized RV tires must support the RV’s certified GVWR. Trailer manufacturers get to set a recommended tongue weight for all trailers they build. That tongue weight is deducted from the trailer’s GVWR to establish minimum GAWR certifications which they also set.

Without an option offered by the vehicle manufacturer, the OE tire designated size must be maintained. A ST235/80R16 is a designated size. That tire's designated tire size does not change with the addition of a higher load capacity letter. That extra load capacity is just providing load capacity reserves.
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Old 08-24-2020, 05:36 PM   #115
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I understand. You wouldn't go from 235/80 to 235/85 because your one of those who has to do exactly what the book says not more.
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