Thread: 2 spare tires?
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Old 03-08-2021, 08:00 PM   #18
JRTJH
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Join Date: Mar 2011
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Most ST tires are made with steel belts under the tread and polyester cord fabric supporting the tire's "radial belts". In other words, the tire is "wrapped in polyester woven fabric from one side to the other with steel wrapped around the tire under the tread.

If you imagine a woven rope rated at 2000 pounds being pulled at each end, once the rope reaches 2000 pounds, any additional tension will start "tearing at the woven strands". So, if you could imagine that rope with 3000 pounds of pull, you would start to see the individual fibers in the woven rope start to break. One after another, they'll break until the rope snaps in two.

Sort of the same thing happens inside the walls of an ST tire when it's critically overloaded. The steel belts under the tread will stop it from "coming unglued and destroying itself" but those polyester cords in the fabric, just like the rope, will start to stretch beyond their limit and the strands of individual fibers will start to break. One after another, they'll come apart, weakening the entire tire sidewall structure...

Nobody knows whether the cords in the tire that's critically overloaded and supporting the entire trailer weight will be damaged beyond the ability to support the designed weight or if it will "develop a hole and self destruct" once it gets too hot (normal towing) or how that tire will respond if it hits a pothole and explodes from the previous damage.....

Tires are not "living things" but they do have an expected reaction to damage or stress... A critically overloaded tire can be as "fickle as a jilted friend" and you just never know when it's going to "stab you in the back"....

It's best, when carrying 4 or 5 tons of mass that's supported on 4 balloons, to make the balloons are the best they can be.......
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