Quote:
Originally Posted by alamostation
If tread separation caused accidents, there would be overturned semi trucks everywhere. Somewhere I read that most tire treads you see on the road are from cars, so there would be even more crashed cars.
The point I think needs to be taken from this is to keep your spare tire fairly new. This comes from experience. After changing a flat a few years ago, my spare threw the tread within an hour, far from the nearest town.
It is possible to drive miles on the bare steel belt without the tire going flat.
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Semi trucks tend to use retreads for the trailers and sometimes for the rear wheels of the tractors. These are likely responsible for most of the caps that you see. These tires are run in fours at each corner, so a single tread separation is not going to have the same effect as on a car. The front tires on tractors are always new tires.
I would think that the most common cause of tread separation on a car tire is overloading or underinflation. How many times do you see a car on the highway with an obviously low tire?