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Old 10-21-2017, 10:47 AM   #21
Beau2010
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Having seen multiple blown LT tires on double and triple axle stock trailers while turning sharply, I would not use them unless I knew for sure I would never have to turn sharply. Truck tires are simply not made for the stresses a trailer tire will encounter.
 
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Old 10-21-2017, 10:54 AM   #22
CaptnJohn
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Not true about using LT tires on a trailer. They are fine on something a little lighter. I put firestone transforce on my Raptor 300mp dual axle trailer after having several sets of ST tires with problems. Never had another issue after I installed them. FYI both axles weighted in around 12k loaded. The tires are rated at 3042lbs ea.
12K loaded and 3042# rated tires do not have enough reserve for me to be comfortable even after a 20% reduction for pin weight. But I like redundancy and overkill on all safety items.
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Old 10-21-2017, 01:11 PM   #23
OutlawPilot
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We just signed the order for our 2018 381TH, so hey there fellow hybrid-toy hauler! We're brand new in the 5th wheel world as we're coming off 3 years in a motorhome. I hadn't even considered tires on the trailer. At the very least I'd have hoped replacing them wouldn't be necessary before delivery, but with some of the comments I'm starting to wonder.

We only plan on moving the trailer a couple of times within a year of delivery (not until April) and even then, only within about 70 miles. Surely replacement of new tires can hold off a while in this case???
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Old 10-21-2017, 03:04 PM   #24
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We just signed the order for our 2018 381TH, so hey there fellow hybrid-toy hauler! We're brand new in the 5th wheel world as we're coming off 3 years in a motorhome. I hadn't even considered tires on the trailer. At the very least I'd have hoped replacing them wouldn't be necessary before delivery, but with some of the comments I'm starting to wonder.

We only plan on moving the trailer a couple of times within a year of delivery (not until April) and even then, only within about 70 miles. Surely replacement of new tires can hold off a while in this case???
Best move I made was going from a class a to a 5er. Hope you find the same feeling as well.
Check the brand and LR when your rig arrives. Hopefully you will be pleasantly surprised to find Sailun tires already installed.
Yes, waiting until April should not be a problem. Keep the oem tires properly inflated and covered. With luck the oem tires are relatively fresh as well.
One thing to consider ~~~ my 2017 HC arrived with Rainier LR E tires. My tire dealer ordered Sailun replacements before the 5er moved. I offered the Rainier tires to him for $30 each and he accepted. Had there been an 8 month wait he may have not wanted them and a Craigslist hassle would probably begin. I was happy with the no hassle $150 off my bill.
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Old 10-21-2017, 05:03 PM   #25
jcurtis934
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If you are going to run at 70 plus, then get the 65 mph max tires off the rig and go to load range g tires so that they have the capacity to raise the max speed bar. Why endanger others on the road?
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Old 10-21-2017, 05:14 PM   #26
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captnjohn, You are absolutely correct, there is not much of a safety margin with the LT tires (on paper). As stated previously, I have had lots of issues with ST tires. The set of Carlile tires that came on my brand new 2007 toyhauler had 1/4 deep x 3" long cracks in the tread at 3000k miles on all six of the tires. Replaced them with Lts and no more issues.

People every day load there pick ups to the max and haul around what ever they want. When is the last time you have seen a blow out on a truck tire ?
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Old 10-21-2017, 06:05 PM   #27
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captnjohn, You are absolutely correct, there is not much of a safety margin with the LT tires (on paper). As stated previously, I have had lots of issues with ST tires. The set of Carlile tires that came on my brand new 2007 toyhauler had 1/4 deep x 3" long cracks in the tread at 3000k miles on all six of the tires. Replaced them with Lts and no more issues.

People every day load there pick ups to the max and haul around what ever they want. When is the last time you have seen a blow out on a truck tire ?
The only blowout I ever had was on a new Ram. A Goodyear LT tire. The truck had less than 4000 miles on the odometer. Pressure was checked in NC and tire blew in WV. Bed was empty. But I've only been driving 53 years and put on 30,000 - 55,000 miles annually.
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Old 10-21-2017, 06:54 PM   #28
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The standard LT tires that come on our trucks have a much higher reserve built into them than the ST tires that normally come on campers. Weight them you will see the difference.
My light weight High County weighs 9200 pounds empty. My Ford 250 weighs in at 8400 pounds. When you add 1800 pounds pin weight to the truck now to weighs in at 10200 and the HC now has 7400 pounds on the tires which are rated for a little over 3000 pounds each at 107 MPH. I have plenty reserve because I will probably never pull my HC at any where near a hundred MPH. After you add everything I carry I’m still way under 12000 pounds the tires are rated for and are no more likely to blow out than my truck tires.
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Old 10-21-2017, 07:12 PM   #29
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MLH is correct. LT truck tires or any passenger car tire for that matter are built with a lot of reserve capacity. They are manufactured to a much higher standard than ST tires.

There are thousands of people towing 16-18k heavy toyhaulers around with SWR trucks. Nearly every one of them is overloading there tires yet I have yet to see one on the side of the road with a blown tire.

On the way home from Talladega this past weekend, we saw at least a dozen trailer tire blow outs on the side of the road.
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Old 10-21-2017, 07:58 PM   #30
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Just so you know. Our 381th is fresh from factory. Came with Rainer ST LR F!
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Old 10-21-2017, 08:20 PM   #31
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People have been talking of all the reserve built into P and LT tires but no one has been able to find any documentation. Waiting to see someone, anyone provide docs from any tire manufacturer.
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Old 10-22-2017, 08:09 AM   #32
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At the National Rally Keystone stated that they 2017 modification that the RIAA made to their requirements makes the requirement for tires to be 10% over axle rating. That forced Montana to go exclusively to Sailun 627 G tires rated at 4400lb. This also eliminated the Goodyear G614 option as it didn't meet the RIAA spec on 7000lb axles.

At least that's what Mark Krolh said.
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Old 10-22-2017, 08:20 AM   #33
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At the National Rally Keystone stated that they 2017 modification that the RIAA made to their requirements makes the requirement for tires to be 10% over axle rating. That forced Montana to go exclusively to Sailun 627 G tires rated at 4400lb. This also eliminated the Goodyear G614 option as it didn't meet the RIAA spec on 7000lb axles.

At least that's what Mark Krolh said.
I don't doubt what you are saying yet my Montana HC 370BR arrived with Rainier tires on and 7000# Dexter axels. The wheels and valve stems are exactly the same as those on Montana units. Weight and cost are still a priority.
I switched to Sailun S637 with less than 45 miles after purchase.
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Old 10-22-2017, 10:40 AM   #34
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When was the rally?


Apparently Keystone has not made the switch yet because I took delivery of my 381th which came directly from the factory last week. As I mentioned above it came with Rainer ST tires. Six of them! Yeah I am more than a little aggravated that Keystone would use tires that I can't run safely at interstate speed!
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Old 10-22-2017, 10:43 AM   #35
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Rally was mid September 2017. He was speaking specifically for Montana and not the High Country 3 axle. Saliun 637 G have been standard on Montana for over a year.
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Old 10-22-2017, 10:58 AM   #36
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Do yall still consider the High Country a Montana?
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Old 10-22-2017, 11:05 AM   #37
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Aren't the Saliun 637 G tires still ST?
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Old 10-22-2017, 11:07 AM   #38
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Montana with and without the Legacy option are made in a different plant from the Montana High Country. The Montana HC has different specs to keep it lighter and less expensive than the regular Montana. It's the old marketing Good, Better, Best set of products.

I imagine that if you put all the options on a HC, it would be as heavier and cost more than a base line Montana.

It's really about floor plans and features. You pick what you like and pay accordingly. You couldn't have a Montana HC 381TH build as a Montana Legacy because you need the ramp in back instead of a rear fiberglass cap.
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Old 10-22-2017, 11:09 AM   #39
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Aren't the Saliun 637 G tires still ST?
mine say so on the side of the tire. But I bought them at a tire store and they were not installed by Keystone.
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Old 10-22-2017, 11:11 AM   #40
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mine say so on the side of the tire.
I'm sure there's more to the tire then just the "ST" rating, but from the reading I've just started to do, isn't ST part of the reason to replace the existing tires? So if I'm (perhaps incorrectly) relating ST to not being good enough, then why do people like Saliun 637 G tires if they're ST?
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