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Old 11-21-2008, 04:04 PM
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Question Difference between Trailer & Truck Tires?

I was wondering what is the difference between Trailer Tires & Truck Tires?

A customer @ my buddies shop has a 35' horse trailer.
Its getting 4 brand new 14 ply Radial trailer tires.

I can guess that there would be a legal issue if you had a wreck with these tires on a truck.

I am just wondering if they are made differently & if so how & why?

They have "for trailer only" embossed in the side wall so there really is no excuse.

I could not help but drool over 14 ply's




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Old 11-21-2008, 04:42 PM
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I am pretty sure it has to do with speed rating. I am thinking that the trailer tires are not designed for high speed. Thinking is trailers should not be towed at 80-100mph. So the belts are in the tires at a different angle to hold more weight, but not so good at high speeds.
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Old 11-21-2008, 04:49 PM
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When I was buying a new set of tires for my enclosed trailer ... my tire guy told me that the trailer tires are built way different. The trailer tires do not have to be on the front of a vehicle making turns ( changing directions ) ... all trailer tires are simply " followers " but yet need a different type of sidewall for weight bearing loads and for the sidewall loads imposed on them backing up and turning ( ever notice how a tires skips and slips over when backing the trailer into its's place ??? )

My trailer has 5200 lbs axles and 16 inch tires ...
I run the Goodyear Marathrons ...

Just my tire guys ... take on trailer tires
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Old 11-21-2008, 05:19 PM
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Kool
Mine has 10 ply 16" Bias plys.

Came on it when I bought it.





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Old 11-21-2008, 10:28 PM
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Quote:
Originally Posted by Rob Keller

Came on it when I bought it ...


Mine too ...
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Old 11-22-2008, 12:09 AM
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Trailer tires have thicker construction for bruise resistance and more plys in the sidewalls for sway resistance and load carrying ability. They can be used as a vehicle tire but the ride will be terrible and kinda twitchy on the highway, they are really meant to be a follower tire with high sway resistance

The radial trailer tires are basically heavy bias plys with a thick radial cap for cooler running on the highway. If you run them on a regular vehicle it will ride like a semi truck.

In some cases like farm use their durability might be preferable, however as was mentioned they are not designed for high speed use (over 60mph) and get real hot if you run them at high speed. The thick tread keeps the heat in and causes them to delaminate at high speed.

That's why they have high pressure ratings, this lets them run cooler. If you run them at low pressures (30psi etc.) they self destruct due to the sidewall flexing which delaminates the cords from the rubber.
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Old 11-22-2008, 06:35 PM
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trailer tires also have a flexible sidewall.. I guess if someone was real cheap and had an old car that originally took bias ply's, the radial trailers should work just like the old bias ply's, being a lot of trailer tires are and were bias ply... but IDK bout putting them on a truck
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Old 11-23-2008, 06:02 AM
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Quote:
trailer tires also have a flexible sidewall.
I think trailer tires have a stiffer sidewall than light truck tires or daily car tires. This keeps them from flexing and causing trailer swaying. I know a lot of people will put a halfway decent tire on a trailer that is not made for a trailer. When that trailer is loaded down to the max, if you look at the tire, it will appear to look low even with the proper pressure. When you pull the trailer you can feel the tire squirm side to side. Running a tire like that generates quite a bit of heat.
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Old 11-23-2008, 06:10 PM
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they are designed not to sway down the road, but they have more give to them when preassure is exzerted sideways on them.. they need this for tandem axle trailers, the tires have a lot of stress put on them when backing them up in a sharp corner... this is the same reason they use Bias ply for trailer tires.. because they flex more
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