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Old 09-10-2014, 01:55 PM   #1
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ST Tires .vs. LT Truck tires

ST tires are rated for 65mph. Has anyone put LT truck tires on a 26RLS to drive a little above 65 mph? - thanks
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Old 09-10-2014, 02:20 PM   #2
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Goodyear PSB #2011-13 states in part

"Special Trailer (“ST”) Tires
Goodyear Marathon trailer tires are widely used in a variety of towable trailer applications and are designed and branded as “ST” (Special Trailer) tires.

• Industry standards dictate that tires with the ST designation are speed rated at 65 MPH (104 km/h) under normal inflation and load conditions.

• Based on these industry standards, if tires with the ST designation are used at speeds between 66 and 75 mph (106 km/h and 121 km/h), it is necessary to increase the cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.

o Increasing the inflation pressure by 10 psi (69 kPa) does not provide any additional load carrying capacity.

o Do not exceed the maximum pressure for the wheel.

o If the maximum pressure for the wheel prohibits the increase of air pressure, then the maximum speed must be restricted to 65 mph (104 km/h).

o The cold inflation pressure must not exceed 10 psi (69 kPa) beyond the inflation specified for the maximum load of the tire."

I personally don't like to go faster than 65 mps.
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Old 09-10-2014, 02:26 PM   #3
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I can't say that I have the same trailer, but I can tell you that lots of folks have done this with large trailers. I'm sure some here have. Some swear by it, some say its a waste of time. There are pluses and minuses to using LTs on trailers. This has been discussed in depth on rv.net. From what I've been able to glean over the years that this boils down largely to personal preference and what people have a comfort level for.
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Old 09-10-2014, 03:06 PM   #4
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I don't know if this is correct, but I remember reading a few years ago that ST tires are designed with sidewalls that allow the tires to flex during turning. This is because of the dual axles and one tire being pushed inward and the other outward. Truck tires have more rigid sidewalls. I don't know what this impacts or stresses. Perhaps someone else can shed light on this.
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Old 09-10-2014, 03:39 PM   #5
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ST tires have firmer sidewalls than LT tires to control sway from the trailer.
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Old 09-10-2014, 08:08 PM   #6
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Ya wanna go faster than 65 towing a house with your family in the vehicle? Have you thought about upgrading your brakes to slow that freight train down? I am really not trying to be negative BUT.. I dont like reading about another RVer dieing or in a horrific crash on the highway...
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Old 09-11-2014, 09:55 AM   #7
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X2 Seann.
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Old 09-11-2014, 10:25 AM   #8
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Old 09-11-2014, 10:28 AM   #9
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Lots of assuming going on here! Since the OP said "a little above 65", I'm giving him the benefit of the doubt that he's not suggesting doing 75.
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Old 09-11-2014, 03:03 PM   #10
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Might be a good time to Welcome the OP to JOF!

Quote:
Originally Posted by DocBrown View Post
Lots of assuming going on here! Since the OP said "a little above 65", I'm giving him the benefit of the doubt that he's not suggesting doing 75.
I agree.

Bob
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