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Old 05-05-2013, 07:53 AM   #29
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Originally Posted by Globie64 View Post
Okay, so which would be better for a trailer, a P rated tire with more flex, maybe transmitting less vibration to the trailer, or an LT, with more load carrying... reserve?
P rated tires will allow a trailer to go into a sway situation easier than a LT or ST tire.
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Old 05-05-2013, 08:13 AM   #30
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P rated tires will allow a trailer to go into a sway situation easier than a LT or ST tire.
I'd like to see some test data that would support this. I'm not saying it isn't true, it just seems to be said, heard, or read, not tested.
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Old 05-05-2013, 11:53 AM   #31
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I believe those of us that have 6 tires on the ground have an advantage...the weight per tire is low considering the mass of a 34' trailer. That make life for tires easier than, say, a 30' Slideout with 4 tires and about the same weight.

Knock wood, I've been happy with my Marathons.
Go_Navy,

I'm curious what brand of tires are on your trailer today. Are you replacing them due to wear or age?

The universe of 34' trailers is obviously smaller and quite honestly unless someone can note differently, the reports of ST tire failures seem to be much lower on the 34's than on the tandem axle trailers. As noted by HiHoAgRV, when you consider the load per tire, the 34' Airstream does distribute the load across 6 tires. Most of us who have the 30' or 31' model slide outs are probably carrying more weight per tire than any other Airstream built. I know my local dealer's employees all say that the 34' Airstream is their favorite to tow due to that 3 axle suspension.

Quite honestly I never had ST tire problems until I bought my 30' slide out. I've had belt slippage on two Maxis ST E rated ST's and had lost a good chunk of tread on a Marathon D rated ST. Both brands of tires failed after 3 seasons of use. I firmly believe that the high load factors and the ST tire construction shorten the life of these tires making them more prone to failure. I'm very careful regarding tire inflation and speed and I know for a fact that underinflation/speed was not a factor in any of my failures. The only saving grace is that the failures were detected in my driveway and not on the road.

Three years of life isn't comfortable in my situation and I bit the bullet and upgraded to 16" wheels and LT tires last year. Based on what I see here, that upgrade will probably prove out to be a good move. However if I were in your shoes, I really don't see the need to have to go the LT route at this point. As noted by others, there are a lot of satisfied ST tire users out there and while your 34' is large and heavy, it has the advantage of 6 tires to carry that load. That to me makes a big difference and I would seriously consider putting another set of ST tires on your trailer. As to brand, we all have our preferences. Again if I were making that swap, I personally would probably consider putting a set of major branded tire ST tires on.

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Old 05-05-2013, 12:43 PM   #32
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I'd like to see some test data that would support this. I'm not saying it isn't true, it just seems to be said, heard, or read, not tested.
for what it is worth....
some 10 years ago i swapped a set of lt tires for p tires on a car trailer. the ride went from nice and stable to white knuckle driving. the fact that some p tires have softer sidewalls than others is also a factor. just sayin'.....
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Old 05-05-2013, 01:43 PM   #33
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This is all great information, thanks to all of you. I feel pretty good about my Bridgestone LT tires, have to be a ton better than what's on there.
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Old 05-05-2013, 02:35 PM   #34
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This is all great information, thanks to all of you. I feel pretty good about my Bridgestone LT tires, have to be a ton better than what's on there.
What size and Bridgestone LT's do you have?
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Old 05-05-2013, 02:41 PM   #35
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Old 05-05-2013, 09:37 PM   #36
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I've used Continental Vanco 2 tires on my commercial van. They out wear the original Goodyears 3 to 1.
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Old 05-06-2013, 03:04 PM   #37
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Thanks. I will be keeping the 15" rims. So that part is an easy decision. I dont know which is better the LT or ST tires and frankly dont know anything about tires. I have read so many meandering posts about tires on this website..I was hoping for a pretty simple answer/recomendation on which brand and which type (LT or ST).
I've been told that ST tires have stronger side walls to deal with the extreme side forces when cornering with tandem or triple axels.
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Old 05-07-2013, 06:35 AM   #38
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I've been told that ST tires have stronger side walls to deal with the extreme side forces when cornering with tandem or triple axels.
There's debate about whether this is true or not, but one thing is clear. There are very few sidewall failures in ST tires not caused by road hazards. The real issue with ST tires is belt leaving belt separations, commonly called "tread" separations.
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Old 05-09-2013, 12:58 PM   #39
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Hi Ricky,
Thanks for your post. You may have noticed I also have a 34'. Can I ask what tires you have and if you are happy with them ...Thanks !
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Old 05-10-2013, 01:58 PM   #40
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Interesting! I've wished Michelin would make an ST tire as I have no confidence in Goodyear marathons for my 34' classic. What do you mean "weight rating on sidewall must be derated"?
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Old 05-11-2013, 06:56 AM   #41
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.......What do you mean "weight rating on sidewall must be derated"?
On every street tire sold in the US, the tire must have a maximum load carrying capacity written on the sidewall. When passenger car tires are used in light truck applications (pickup trucks, vans, and trailers) the load carrying capacity is reduced by a factor of 1.1
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Old 05-12-2013, 01:17 AM   #42
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Please see post #20 in this thread for the Federal tire regulation on derating a passenger tire used in light truck applications.
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