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Old 12-16-2015, 09:39 AM   #1
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ST vs LT tires ?

What do you think about LT tires on the trailer. I've noticed through out the years on the road that it's always the trailer tires blowing and not the trucks. I've seen boat trailer, horse trailers, TT trailers, plus many others SIDELINED .

There are many thing going on to TT tire while park, sun,Temp,weather,etc. I just DONT agree in a tire going in 1-3 yrs.

There got to be something to that, ST vs LT,

WHAT DO YOU GUYS THINK????
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Old 12-16-2015, 10:15 AM   #2
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There are numerous threads on this site pertaining to the debate and it comes up at least once a month.

Here is what I know:

LT has softer sidewalls
ST has more load per tire in same size and load rating
LT has higher speed ratings
ST life span is less based on miles

You can run LT's but you need to get a adequate weight rating to meet your trailer.
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Old 12-16-2015, 10:22 AM   #3
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I'm sure you'll get many thoughts on this. Lots of members have changed to LT tires over the years.

For me personally, I went with Maxxis M8008 ST tires in a LRE (one step above my "required" load range) and I'm very happy so far. The tires run cool and are spec'd significantly above anything I'll throw at them. Many are getting 5 years or more out of their Maxxis ST tires. It's the Towmax tires that are only going 1-3 years. But those tend to go without much warning; it's not like they're showing wear and people are pushing them, they just lose a tread and blow up unexpectedly. Or in my case, you see the tread separation before any damage occurs and take proactive measures.

Anyway, there's a case to be made either way. In my situation, ST tires made the most sense this go around. Next time I need tires, I'll examine the option of going to LT again and see where it takes me. A large part of my decision matrix this time was budget related; I couldn't get good LT tires for the deal I got on the Maxxis ST tires. There are structural differences to consider as well...
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Old 12-16-2015, 11:36 AM   #4
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Quote:
Originally Posted by 3'senough View Post
There are numerous threads on this site pertaining to the debate and it comes up at least once a month.

Here is what I know:

LT has softer sidewalls
ST has more load per tire in same size and load rating
LT has higher speed ratings
ST life span is less based on miles

You can run LT's but you need to get a adequate weight rating to meet your trailer.
Do a little research. My Dad put LTs on their old Nomad, larger tire, better clearance, better quality tire, never had any issues. They do need to be derated for trailer applications, but I do not recall the percentage. You also have to derate for having tandems (ST or LT tires) I think it was 20%, for tandem applications. If you can find a set of LTs to put under your rig, I would do it in a heartbeat.
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Old 12-16-2015, 12:19 PM   #5
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I'm sticking with ST tires. I believe it's the age, environment and long periods of sitting that causes trailer tires to degrade much more than mileage. I take care of my TT tires; always covered when not in use, vigilant about watching air pressure and I visually inspect them frequently. That said I will replace my TT tires at 4 years from MFG date.

Ironically the only tire blowout I have had was on my Duramax with the off brand Chinese LT tires that the dealer put on it when I bought the truck. They were <2 years old, ~10k miles, properly inflated and well under the load maximums. My truck is not my daily driver, but does get driven frequently and since they were LT I didn't think I had to cover them. Guess that was a mistake because after the blowout occurred I inspected the others and they were showing signs of sidewall cracking as if they were developing dry rot.

Why do I mentioned that, because this personal experience has proven to me again the environment is the bigger issue, not ST vs LT, so the truck will begin to get tires replaced based on age opposed to miles, the same as my TT.

The daily drivers at our house create enough wear that those tires are being replaced about the same 4-5 year interval, but tread life is dictating it as much as age.

Everyone will have there own opinion, but I think we all agree that age needs to be the decider not exclusively tread life.
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Old 12-16-2015, 12:20 PM   #6
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I ran a set of Goodyear LT's on my old rig. I had no problems with them. Look for info on the Goodyear site about the reduction in load carrying capacity.
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Old 12-16-2015, 02:15 PM   #7
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Here is quote I found that tells the brief difference in construction between the 2.

Tim Fry, senior development engineer with Goodyear Tire & Rubber Company stated, “The major difference is reflected in the polyester cords used in ST tires. These cords are bigger than they would be for a comparable P or LT tire. Typically, the steel wire also has a larger diameter or greater tensile strength to meet the additional load requirements. Because of the heavier construction for an equal volume of air space, an ST tire is designated to carry more load than a P or LT tire.”


I too changed my Towmax this past season to Maxxis 8008's as well based on reputation.

If I were to go LT it would have to be most likely a F or G rated tire to meet the same weight ratings. But the cost is very high going to that tire and I would just go with a 17.5 commercial tire at that point.

Here is a little more info based on pressure and weight capacities.

"Light Truck tires are not always the same size, and do not always have the same load carrying capacity as ST tires. Depending on your trailer’s axle weight rating the tire load capacity might be 3420# @ 80 psi for example. The Michelin XPS RIB LT235/85R16E tire load capacity is 3,042# @ 80 psi. If you switch to LT tires for trailer applications the tire inflation pressure and/or the size of the tires would need to be capable of matching the load capacities of the trailer. If the size of the tire is increased to compensate for load capacities there needs to be sufficient clearance for the larger tires. Cost can be prohibitive too when you not only consider purchasing new tires but larger wheels for the tires to go on."
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Old 12-16-2015, 03:08 PM   #8
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First trip will be 1200 miles. Did not want to take any chances with a TT this large over that distance. Went with the ST 16" Radials by Maxxis from the factory.

Maxxis M8008 Radial Tire | Maxxis® TiresÂ*
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Old 12-16-2015, 03:40 PM   #9
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Quote:
Originally Posted by Fairenatic View Post
First trip will be 1200 miles. Did not want to take any chances with a TT this large over that distance. Went with the ST 16" Radials by Maxxis from the factory.

Maxxis M8008 Radial Tire | Maxxis® TiresÂ*
It's nice that they are finally offering this as an option. When I bought my trailer, there was no mention of tires. AND I didn't know to ask. It's one of the things I learned to learn about here on the forum. After some research inside and outside this forum, I became very aware of the shortcomings of the OEM tires supplied with my trailer, and that knowledge is the only thing that saved me from A LOT of damage and heartache.
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Old 12-16-2015, 03:47 PM   #10
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Quote:
Originally Posted by Camper_bob View Post
It's nice that they are finally offering this as an option. When I bought my trailer, there was no mention of tires. AND I didn't know to ask. It's one of the things I learned to learn about here on the forum. After some research inside and outside this forum, I became very aware of the shortcomings of the OEM tires supplied with my trailer, and that knowledge is the only thing that saved me from A LOT of damage and heartache.
I knew and asked and there was nothing they would do for me at the time in 2013-14.
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