When you find that your car's tires have been attacked by nails, don't panic! In most cases, you can still run at high speeds after a single tire repair. Looking at the regulations of major tire brands, most of them recognize a repair, but like an angel with broken wings, the repaired tires may not be able to restore the original speed - for example, some tires of Bridgestone and Ukehama, the speed limit is reduced to 85 miles (about 136km h) after repair, but this is still stable within the domestic high-speed speed limit. Of course, if the run-flat tire is seriously injured and the rubber cracks are like cobwebs, then you have to say goodbye to the old love with tears and welcome the new tire.
However, when it comes to the second tire, things start to get subtle. If the same scar is abundant, most tire manufacturers will shake their heads and say "no", after all, the wound is too big like a "flaw" in martial arts, which seriously affects the tire skeleton structure, once the wound diameter exceeds 6mm, it may hurt the steel wire layer and the cord layer, which will cause the risk of bulging or even puncture. There's a little bit of a hiccup here, it's like drawing a map on a round tire, and a band-aid has been applied at 12 o'clock, so the upper part has to be guarded against, and many brands stipulate that the angle between the two patches must be greater than 90°, or the distance between them should be more than 40cm.
If the number of tire repairs exceeds three times, the rules of each family will show their magic. For example, Benelli complies with the British BU159 standard, as long as it is not on the shoulder and sidewall, the wound of the tread part can be remedied, as if the tire also has "nine lives". However, Bridgestone's official website clearly points out that three tire repairs are already the upper limit, and any more should be retired. Therefore, we ordinary car owners should have a number in their hearts, if the tire repair record has reached three times or more, unless you don't care about the cost of tire change, otherwise when running at high speed, it is better to be cautious, after all, "safety first" is the last word, life is not like a game, can not be archived again!
In short, in the choice of tire repair and replacement, we should not only consider the economic account, but also take into account the safety factor. Tires carry not only cars, but also our precious lives. Remember the *** account to learn more about car maintenance knowledge and escort you for every trip! The next time you see the new "medal" on the tire, you will know what to do! Don't forget to like and favorite, so that more riders can benefit!