question on tire research

GrumpyandGrandma wrote:

Me Again wrote:

GrumpyandGrandma wrote:
Most RV tire issues are not due to where the tire came from, but from improper loading, under inflation and speed. 99% of all ST tires (US made included) are speed rated at 65. As to using LT on a tandem axle set-up, it is not recommended due to the side wall flex in hard turns. LT's have been known to pop off the rim in a hard turn due to the stiffer sidewall. The other big issue with ST tires is how long the unit has sat on a dealers lot (usually gravel) without moving before it is sold.

What a crock! ST tires fail at a high rate because they are a bottom tier cheaply made product, that we designed for utility trailers and local service. Some brainyact decided that one could see America with them on large heavy tall trailers.

Chris

You have your oppinon which if fine, but all you have to do is "research the facts". I camp with two very large clubs that are composed of 95% trailers and fw and the members do not have a large tire failure rate. Those that do are usually at the 5 to 6 year age range.

Here is some of the info

Trailers will be more stable and pull better on tires designed specifically for trailer use. Since Special Trailer (ST) tires are constructed with heavier duty materials, they are tougher than typical passenger vehicle tires. This is a plus because trailer suspension systems are generally stiffer and less sophisticated than automotive suspension systems.

Special Trailer (ST) Tire Speed Ratings

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

However Goodyear Marathon and Power King Towmax STR tires featuring the ST size designation may be used at speeds between 66 and 75 mph (106 and 121 km/h) by increasing their cold inflation pressure by 10 psi (69 kPa) above the recommended pressure for the rated maximum load.

Do not exceed the wheel’s maximum rated pressure. If the maximum pressure for the wheel prohibits the increase of air pressure, then maximum speed must be restricted to 65 mph (104 km/h).

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

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

Allan Kam, former senior attorney for the NHTSA apparently agrees in court testimony with "the crock"!!

Here's some 'research' for ya.............

Another "club" - 678 posts since 2006 and counting.
*NOT* heavy 5th wheels, but probably the lightest Travel Trailers on the market - Airstream.

Airforums on ST: "Goodyear Marathon Failures"

The crock is the standard company "line" you regurgitate - as evidenced in court testimony by GY:
"In *every* case the customers were at fault."
The tires were "run too hot, too fast, with too heavy a load, too little air, punctured and poorly repaired or they were driven over sharp objects" - and the most humorous is driven - "too seldom".

Reply (in court testimony) to that by the former senior attorney for the NHTSA = "That's absurd".

IMO - his reply indicates....."that's a crock!", ROTFL..:B

BTW - The outcome is *fact* - not opinion.
GY *lost* the crock argument and the suit.

But here's a tire *opinion*..... ST = Simply Terrible!..:(



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