Grit dog
Black Diamond, WA
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You guys are just insufferable with this tire thing…..
Guy could literally get 12,800lbs capacity worth of 15” tires if he wants for a trailer that most likely has 8klbs or less on the axles.
I don’t discount the additional durability and tire life available by upsizing to 16s. But it’s kind of like wearing your parka, furry middens, and touque to go into the beer cave at the corner store….lol.
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ktmrfs
Portland, Oregon
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Thermoguy wrote:I'm curious - has anyone seen or heard of any manufacturing testing for ST tires? I have seen tires tests for LT, passenger, performance, etc, But what about ST tires? There are google reviews, that is not what I mean. What manufacturer actually tests ST tires and what standards do they have to meet?
ST tires, just like car and LT tires have federal motor vehicle standards they must meet. so the mfg is required to test to those requirements. Now for an ST tire, the test is not near as stringent as a passenger car tire.
Will a mfg publish results of the test? Highly unlikely. They just file them with the required federal agency.
In addition, tires like the goodyear endurance have a speed rating well above and ST tire (85mph IIRC) and there are federal standards and testing to meet those requirements.
Now as far as independent tire reviews, haven't seen any. And I've never seen an independent review of any tire where they actually test them to the load, speed rating, etc. that they must meet.
Occasionally independent tests will try to test the tire wear vs. tire wear rating, but that's about it.
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Thermoguy
Graham, WA
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The reason I ask is because when I was looking to buy my last set of tires I asked a couple of different shops about LT vs ST. Everyone said buy ST for a trailer, but when questioned, they all admitted that ST tires are not tested the same as a vehicle tire. They don't have the same standards and don't have to perform like a vehicle tire. Since you don't ride in the trailer, you don't have the ride experience that you expect in a car or truck. Fortunately, my trailers fall within the weight range that I can use an LT tire and that is what I choose. But, just thought since this is such a controversial topic on these threads, to ask, how are they tested?
* This post was
edited 06/10/23 08:19am by an administrator/moderator *
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Huntindog
Phoenix AZ
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See my post on page 2.
* This post was
edited 06/10/23 08:20am by an administrator/moderator *
Huntindog
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StirCrazy
Kamloops, BC, Canada
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JIMNLIN wrote:Quote: the tread on a St tire is designed to allow it to scuff sideways easier, as in when you a sharp 90 degree or more turn when backing into a site.
ST tires come with all styles of tread designs (AT types....AS types....and rib type tread patterns) so there is no design attempt for easier side scrubbing.
Rubber treading compounds (hard or soft) has much to do with any tires side slip abilities.
I can't agree with you there, I have been looking at st vs lt tires for 4 years now trying to decide which would be better for my 5th wheel. yes, there are different tread patterns, but the one common Theam of them is the lack of aggressive outside lugs which bite in and resist side movement like LT tires have. this enables ST tires to handle more lateral movment without increased resistance.
plus, another plus for the st tire is they are generally made of different rubber compounds that make them stronger than the equivalent LT tire based on a simular volume of air. Another side benefit of these is they generaly have a lower rolling resistance which equates to a fraction better fuel milage.
the other thing I have found also is to switch to a LT tire the closest thing in size to what I now have (235/80R16 ST) is a 235/85R16 . by switching to this I lose 500lbs (aprox) of capacity per tire.
Part of the biggest issue is dealers generaly put the cheapest tires on the rv's they can get so the weight of the rv is just covered by the tires and sometimes it is less as they assume the hitch weight as not being a load on the tires in some cases. for instance, my 5th wheel came with 10 ply loadmax tires so what I have found the best thing to do would be to just stay the same size in a st tire but go up to a 12ply or even a 14 ply if your rims can handle the higher air pressure requirements. I know a lot of people go to 14 ply then just run them at 90 which is probably fine, but they will run hotter than if they were at 110. When they design LT tires, they have less stiff sidewall and softer compounds, so they handle impacts from road hazards better (ie. potholes) and don't transfer it to the vehicle as much. This is great for a truck, but the downside is less carrying capacity for the same size of tires and more flexible side walls, and better tread grip. When combined with the more agressive tread patterens (usually the addition of shoulder lugs and deeper tread and such) this causes them to grip harder in tight turns which increases the lateral stresses on the belt layers.
the main issue is instead of looking at quality ST tires we are usually talking about switching from China bombs to LT, which ya, that is probably an improvement, but we should really be looking at actually weighing our setups (because we all know how accurate that tally plate is ![[emoticon]](http://www.coastresorts.com/sharedcontent/cfb/images/wink.gif "wink") ) and going with a quality ST tire that has the extra carrying capacity to cover our rigs and some breathing room
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manley
Wichita Falls, TX
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For what it’s worth, I replaced all four of my 3-year old Endurance tires with Hercules strong guards yesterday. Having lost confidence in the GY bombs, I figured I couldn’t be any worse off with the new (Chinese) tires than with the old (American) ones. The reviews that I found on the Hercules tires and brand were decent. We will see as time will tell.
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ktmrfs
Portland, Oregon
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manley wrote:For what it’s worth, I replaced all four of my 3-year old Endurance tires with Hercules strong guards yesterday. Having lost confidence in the GY bombs, I figured I couldn’t be any worse off with the new (Chinese) tires than with the old (American) ones. The reviews that I found on the Hercules tires and brand were decent. We will see as time will tell.
what issues or problems were you having with the Goodyear Endurance?
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JIMNLIN
Oklahoma
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Joined: 09/14/2003
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Thermoguy wrote:The reason I ask is because when I was looking to buy my last set of tires I asked a couple of different shops about LT vs ST. Everyone said buy ST for a trailer, but when questioned, they all admitted that ST tires are not tested the same as a vehicle tire. They don't have the same standards and don't have to perform like a vehicle tire. Since you don't ride in the trailer, you don't have the ride experience that you expect in a car or truck. Fortunately, my trailers fall within the weight range that I can use an LT tire and that is what I choose. But, just thought since this is such a controversial topic on these threads, to ask, how are they tested?
clicky link
The info huntingdog posted comes from this thread by seniorGNC back in 2009. Hot topic on rv webstires back then per FMVSS testing required by all tire mfg and their road tires and puts to sleep all the false opinions that some how the ST is superior to the LT tire for trailer use.
"good judgment comes from experience, and a lot of that comes from bad judgment" ............ Will Rogers
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coloelk
Colorado
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Get your trailer axles aligned and you'll see what is causing 95% of your tire issues.
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manley
Wichita Falls, TX
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ktmrfs wrote:manley wrote:For what it’s worth, I replaced all four of my 3-year old Endurance tires with Hercules strong guards yesterday. Having lost confidence in the GY bombs, I figured I couldn’t be any worse off with the new (Chinese) tires than with the old (American) ones. The reviews that I found on the Hercules tires and brand were decent. We will see as time will tell.
what issues or problems were you having with the Goodyear Endurance?
Had one separate completely and do pretty bad damage. Manufacture date code “0720” and inflated (religiously) to 80 psi. No uneven wear, and no signs of impending failure. I bought those (and paid a premium) to avoid those kind of problems.
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