Can old and new tires be mixed?
When changing tires, you should not mix different types and specifications of tires. Don't mix different brands and patterns of the same pair of tires, and try not to mix old and new tires. Mixing different types and specifications will cause serious safety hazards, and mixing different brands, patterns and old ones will also reduce the grip performance of tires and affect handling and stability.
Tires are often used in complex and harsh conditions. They are subjected to various deformations, loads, forces and high and low temperatures during driving, so they must have high bearing performance, traction performance and cushioning performance. At the same time, it also requires high wear resistance and bending flexibility, as well as low rolling resistance and heat generation.
Refurbished tires cannot be purchased, the seams of new tires will be very regular, and there will be obvious overlapping layers and protrusions between the tread and sidewall of refurbished tires. In addition, the text and logo on the sidewall of the new tire are integrally formed with the tire, and it will not be damaged by scraping with nails. If the sign is old, or can be removed after scraping, it must be a retread tire, or even an inferior product.
Precautions for purchasing and using tires:
1. Do not use tires without CCC logo.
The quality of tires is directly related to the driving safety of automobiles. The Regulations on the Administration of Compulsory Product Certification stipulates that automobile tires must be certified and marked with certification marks before they can be shipped, sold, imported or used in other business activities. Tires without CCC logo cannot guarantee safety.
When consumers buy tires, they must pay attention to the CCC logo printed on the tires. If consumers are in doubt when buying imported tires, they can ask the seller to provide the inspection and quarantine certificate of imported goods for this batch of tires. If they can't provide or find that the mark is unclear and there is no CCC mark on the tire, they can directly consult the local inspection and quarantine department.
2. Tires also have an expiration date.
Because tires are rubber products, there are aging problems, so consumers should pay special attention to the production date of tires. Generally, the production date of tires will be marked on the tire wall, and consumers can find it after the word dot. The format is a combination of four numbers, which means "week number"+"two digits after the year". For example, 32 16 means that the production time is the 32nd week of 20 16.
Generally speaking, according to the frequency and conditions of use, it is best to replace the tires every two to four years. If possible, four tires can be replaced together, or at least one pair of the same tires can be replaced. New tires can be placed on the driving wheels (usually the front wheels). Try to avoid replacing only 65,438+0 tires to ensure the safety performance of tires to the greatest extent.
3. "Original match" is the best choice
Some car owners often consider upgrading their tires when replacing them, and choose the currently popular tires with large rims and low flatness. This kind of tire can increase the ground contact area, improve the grip performance of the vehicle, improve the stability when driving, and meet the aesthetic requirements of consumers in appearance.
However, the inspection and quarantine personnel warned that this kind of tire will also bring adverse effects such as increased fuel consumption, increased noise and reduced comfort. In fact, for ordinary car owners, it is the best choice to replace the tires according to the original specifications, because the original tires are a balanced choice made by car manufacturers for maneuverability, safety and economy. In addition, due to the relatively high manufacturing technical requirements, some specifications of low flat tires still need to be imported.
Hualong. Com- It turns out that there are so many ways to buy automobile tires that experts teach you how to choose them.
Baidu encyclopedia-tires (round elastic rubber products assembled on vehicles or machinery)