Because tire transposition only switches wheels and does not change the mass balance between tire and hub, there is no need to do tire dynamic balance. Usually, maintenance personnel will remove the rotor with large vibration and replace the impeller directly. And re-install it to reduce vibration. The life of automobile tires is related to the driver's driving habits, road conditions and other factors, and it may be different to judge only by the number of years and mileage. If you often drive on the expressway, that is, the road conditions are average or good, you need to replace it after driving for about 80,000 kilometers. If you often drive on rugged road conditions such as gravel roads or dirt roads, you need to replace the tires after driving about 60,000 kilometers.