Tires are rated for a certain speed ; usually a letter code.
Car tires are rated for speeds higher than the speed of most cars.
But... Trailer tires are rated for much slower speeds. Their speed limit is sometimes written in plain english : " Do not exceed xx mph ".
For example, the tires on my popup camper trailer are rated for
60 mph.
Overspeed can put a lot of stress on a tire.
You also have to be carefull with the load, pressure, etc.
Push the limit too far and funny things can happend...
... like here, in june 2017, on I-70, in Utah.
View attachment 334087
The Tire didn't explode : it is just the thread layer that separated from the tire.
Half of it went right thru the floor of our popup camper trailer. The other half, like a twisting snake, went directly towards the cars that were following me.
And Yes... that is an Iron frame beam, torn and bent by the tire. It had absorb much of the hit.
I'm lucky to be still alive because I almost lost control of the vehicule. The traffic behind me went into a complete cahos. Thankfully, nobody was hurt. But it could had been a complete disaster.
When this happend, I was going at 70-75 mph. But during the previous days, I went often up to 80, 85. Speed limit is 80 on I-40 in New Mexico and Arizona. I was just following traffic, right ?
But, even without considering tires, ask any truck driver what are the consequences, on your braking distance, if you have more weight and more speed.
Your braking distances can double and triple more quickly than you think.
So, believe me, now when I'm towing, I'm always on the slow moving traffic lane, and never exceed 55-60 mph.
If the guy in front of me only goes 50, I'm slowing to 50. That's it.