The manufacturers of solid tires tell us that the normal service life of solid tires is generally four to five years. After five years, no matter whether the tire pattern is worn or not, we have to replace it, because the rubber on the tread will become too long. Aging occurs, and many small cracks are the cause of the puncture.

　　 The service life of solid tires will vary depending on the rubber formula of the solid tires, the vehicle environment and driving habits. Therefore, we need to be more careful when driving, and solid tires have signs of aging. For example, most of the aging parts of the tread are small cracks starting from the edge of the sidewall or shoulder. These cracks indicate that the bearing capacity and quality of the solid tire have begun to decline at this time. In order to reduce the risk of puncture, it is best to replace it in advance.

　　 In addition to aging, solid tires also have to wear out naturally. Therefore, the factory solid tire will mark the wear limit on the sidewall before leaving the factory to indicate the real-time wear status of this solid tire. For solid tires without signs of wear, we can also use calipers to measure. Generally, solid tires with groove depths less than 1.6 mm can no longer be used, because the drainage performance and puncture resistance of solid tires will be greatly reduced at this time. In addition, if a solid tire has been repaired three or four times, then the solid tire manufacturer recommends that you better switch the solid tire to the rear wheel to reduce the risk of a tire blowout.