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Old 10-23-2015, 12:00 AM   #141
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Old 10-23-2015, 07:56 AM   #142
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Old 10-23-2015, 08:00 AM   #143
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I'm no tire expert, but I can tell you that I for one would be WAAAAAAYYYY more comfortable towing my camper with LT tires that were rated to carry the load. And I wouldn't cringe and glance at the TPMS monitor every time I accidentally break 65mph on a downhill run.
We couldnt locate LT tires for our 5th wheel so stuck with the ST in an E load rated cat.
Tire prerssure monitoring system 507's from Truck Systems Tech. work great. At 120 kms an hour on a down hill run there is not enough time for the sensors to note an indrease in pressure or temp.

we had LT's on our 2012 Salem TT that were good for the weight - guess we were lucky but then again there is a reason why LT's are for vehicles and ST's are for non turning tires which get tire scrub backing into spots.
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Old 10-28-2015, 08:39 PM   #144
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I do not know that much about tires and the difference. What I do know is that Black Tires in lumberton NC , said that they would not be able to put anything but ST on my trailer. So I bought 4 new Marathons from them and he moved me up to D rated from the Trail Express C rated that came with my unit. I did have about 7000 miles on them when I had a sudden blow out. I had Marathons on my Jayco before, never a problem. So I stuck with the Marathons ST. Black tire is one of the largest Good year dealers around. I was surprised when he said he would not sell me anything else. so far I have atleast 4000 miles on these and they look brand new. I just figured that's there business and they know what they are talking about. He also made me balance them or he would not sell them to me, he said that if I want to go somewhere else that would be fine. But they will not do something that they thought was unsafe. Made me feel like I bought the right tires for my unit.

If you have st tires on your camper then you have rims that are stamped st and you can't put LT tires on a st rim. My Cedar Creek 30RL had Westlake st tires on camper, I put a TPMS on tires, they served me well. The Cedar Creek 32RL came with Goodyear LT tires and should I trade anytime soon for a 36CKTS the Goodyear LT tires will be put on new camper



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Old 10-28-2015, 08:57 PM   #145
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If you have st tires on your camper then you have rims that are stamped st and you can't put LT tires on a st rim.
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Old 10-28-2015, 09:03 PM   #146
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If you have st tires on your camper then you have rims that are stamped st and you can't put LT tires on a st rim. My Cedar Creek 30RL had Westlake st tires on camper, I put a TPMS on tires, they served me well. The Cedar Creek 32RL came with Goodyear LT tires and should I trade anytime soon for a 36CKTS the Goodyear LT tires will be put on new camper
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Would really be interested is seeing a rim stamped ST type tire only. I find nothing in the US Tire & Rim Association about any such restrictions nor do I know of any bead fit requirements or differences in St type tires as they fit on wheels.
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Old 10-28-2015, 09:10 PM   #147
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To all those that run into tire dealers that refuse to mount LT type tires on trailers have you asked to see any company documentation that supports this position? Also has anyone asked how do they plan to handle tires on trailers that were delivered with LT type tires?

Yes there are things that must be taken into account when considering changing from ST to LT type tires.

To those dealers I would also ask if they refuse to change tire size on a passenger car and do they refuse to apply tires with lower Load Index or Speed rating than came OE on the car?
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Old 10-28-2015, 10:00 PM   #148
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To all those that run into tire dealers that refuse to mount LT type tires on trailers have you asked to see any company documentation that supports this position? Also has anyone asked how do they plan to handle tires on trailers that were delivered with LT type tires?

Yes there are things that must be taken into account when considering changing from ST to LT type tires.

To those dealers I would also ask if they refuse to change tire size on a passenger car and do they refuse to apply tires with lower Load Index or Speed rating than came OE on the car?
I know you must know this; Vehicle manufacturers are the only ones authorized to select and fit OE tires. Once selected they are described on the vehicle's federal certification label, tire placard and in the owner's manual.

With few exceptions ST tires and LT tires are not manufactured in the same sizes. When they are, the load capacity of the ST tire is far greater than the LT tire.

To compound the difficulty of doing things right many of the major LT tire manufacturers have worded their warranty packages with statements that disallow ST tires as replacements for LT tires. Michelin has a statement in their warranty package that disallows using replacement tires that conflict with safety warnings in your vehicle's owner's manual. Most RV trailer manufacturers using ST tires as OE without designating options will only recommend ST tires as replacements.

Misapplication is a key word. What does it mean? I've asked a number of knowledgeable people with reference to ST and LT tires. The common answer is based on the vehicle manufacturer's selection for OE tires. It seems that because the LT tires is not specifically designed for service on trailer axles it is a misapplication to use them to replace the ST tire which is specifically designed for trailer axle service.

The FMVSS are not binding on the public at large but very binding for the vehicle manufacturer. In 571.120 the manufacturer is directed to select tires with a minimum load capacities equal to the vehicle's certified GAWR. But, the wording also leaves room for other considerations and uses the phrase "appropriate for that fitting" and go on to also instruct the vehicle manufacturer to set the recommended cold tire inflation pressures for the OE tires. When we take the inflation pressures to the load inflation chart for the OE tires we find the minimum load capacity as set by the vehicle manufacturer as per FMVSS regulations.

Every RV trailer owner's manual I have read (and I read a lot of them at RV shows) only recommends replacement tires of the same size and load capacity be used. Or, others recommended by the vehicle manufacturer.

Every approved tire plus sizing procedure I've read tells the installer - in part - to check the tire placard to insure the replacement tires have the load capacity to equal or exceed the OE tires. Will this sometimes allow the use of LT tires? I used to think so until all the new warranty packages started using wording to disallow that possibility. Are LT hybrid tires suitable for trailer service. That's what their manufacturer says so it must be so. But, there are few of them.
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Old 10-28-2015, 10:15 PM   #149
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You can buy any tire that will fit your trailer wheels and take the tires and wheels to any business that mounts/balances them and I'll wager they won't even ask what kind of vehicle they go on. All this talk about tire dealers refusing to mount LT tires on a trailer is hogwash, just find another dealer to mount them.
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Old 10-29-2015, 05:26 AM   #150
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You can buy any tire that will fit your trailer wheels and take the tires and wheels to any business that mounts/balances them and I'll wager they won't even ask what kind of vehicle they go on. All this talk about tire dealers refusing to mount LT tires on a trailer is hogwash, just find another dealer to mount them.

You are right about that


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