1. All automobile manufacturers have special tire pressure regulations. Please follow the signs on the inside of the vehicle fuel tank cover or on the door. Some tires are marked with the highest inflation pressure on the sidewall, which shall not exceed the maximum value.
Second, the tire loses an average of 0.7kg/cm2 of air pressure every month, and the tire air pressure will change with the change of temperature. When the temperature rises/falls 10℃, the air pressure will also rise/fall by 0.07-0. 14kg/cm2. The air pressure must be measured when the tire is cooled, and the valve cap must be covered after the measurement.
Third, please get into the habit of measuring air pressure with barometer frequently, and don't judge with naked eyes. Sometimes the air pressure runs a lot, but the tire doesn't look too flat. Check the air pressure (including the spare tire) at least once a month. The air pressure of the spare tire should be relatively high to avoid long-term deviation.
Fourth, make sure the air pressure is correct before driving on the expressway; Usually, when driving on the expressway, the tire pressure should be increased by 10% to reduce the heat generated by buckling, thus improving the driving safety.
Five, the two tires on the same axle should be exactly the same pattern specifications, and should be filled with the same air pressure, otherwise it will affect the driving and handling of the vehicle.
6. Insufficient tire pressure will lead to tire overheating. Low pressure causes uneven tire contact area, delamination of tread or ply, cracking of tread groove and shoulder, breakage of cord, rapid wear of shoulder position, and shortening tire service life. Increase the abnormal friction between tire lip and rim, resulting in tire lip damage, or tire separation from rim, or even puncture; At the same time, it will increase rolling resistance, increase fuel consumption, and affect the handling of vehicles, and even lead to traffic accidents in serious cases.
Seven, the air pressure is too high, so that the weight of the car body is concentrated in the center of the tread, which leads to the rapid wear of the tread center. When impacted by external force, it is easy to cause trauma or even puncture; Excessive tension causes tread delamination and cracks at the bottom of tread groove; Tire grip decreases and braking performance decreases; The vehicle jumps, the comfort is reduced, and the vehicle suspension system is easily damaged.
Eight, if it is found that the tire pressure is lower than 20% of the standard, temporary air supply can only be the last resort in an emergency, and it cannot fundamentally solve the problem. Tires must be taken out from the nearest tire shop as soon as possible and checked by professionals.
Nine, a small tire puncture, if not handled in time, will eventually lead to casualties. Please always check whether there are nails, iron chips, glass fragments, stones and other hard objects piercing the whole carcass, or other bumps that may lead to flat tires. Five rules of tire maintenance
Rule 1: The first thing to emphasize in tire maintenance is to maintain the correct air pressure that meets the requirements when driving. There is a maximum atmospheric pressure value provided by the automobile manufacturer on the sidewall of the tire, and the air pressure of all tires (including spare tires) in the cooled state should be checked at least once a month. But just checking is not enough. If you find that the air pressure drops too fast, you must find out the reason to avoid leaving hidden dangers. Nailing, cutting, aging and cracking of valve rubber may be the culprit. If it is a new car, it is necessary to check whether the rim rim edge and tire are in good condition, and whether there is water leakage inspection and air leakage test. After the reason is found out, you can consult an experienced dealer or a big tire shop to see if it is worth repairing, because nailing will damage the internal structure of the tire and is not worth continuing to use.
Rule 2: Under no circumstances should you exceed the reasonable speed required by driving conditions and legal restrictions. If you encounter obstacles such as stones and potholes ahead, you should avoid or pass slowly. Because even if the inflation pressure is correct, the probability of tire damage caused by road obstacles at high speed is higher than that at low speed. The tread of radial tire is covered with steel wire belt, but the edge of tire is not covered with steel wire layer. When driving at a high speed, the tire hits a pothole and other foreign objects, resulting in serious extrusion deformation between the impactor and the rim flange, which may cause yarn breakage of the cord fabric, and the air inside the tire will swell due to yarn breakage. Continuing to use this kind of tire will lead to more and more yarn breakage and eventually form a puncture. Even if the vehicle travels less than 8,000 kilometers at this time, always check the tire condition, including whether there are bulges, cracks, cuts, nails, abnormal tire wear, etc.
Rule 3: Always check the tire condition, including whether there are bulges, cracks, cuts, nails and abnormal tire wear. Some new cars have not been bought for long, and the tires on both sides of the car wear much more and less, or the shoulders wear faster than the rest of the tread. This is caused by poor tire positioning. Even if the vehicle travels less than 8,000 kilometers at this time, four-wheel alignment should be considered, otherwise tires with hundreds of dollars will be easily eaten. Don't simply change the tire. If the car condition does not change, there will still be problems with the new tires. If the tire jitter is excessive, the wheels may be unbalanced, which will not only shorten the tire life, but also affect the handling of the vehicle, which may be dangerous.
Rule 4: If the tire is worn to the wear indicator, it should stop. There is a wear indicator at the left side of tread groove1.6 mm. Wear to this mark and must be replaced. It is dangerous to use tires with excessive wear index, especially when driving in wetlands. Because the pattern is smoothed, the drainage performance of the tire is greatly reduced, and the tire and the water surface basically form a state of water grinding, which hinders the contact between the tire and the ground, greatly reduces the grip, and has potential safety hazards.
Rule 5: The spare tire should be kept away from sunlight, oil, acid and hydrocarbons, which will corrode the tire. All tires should be stored in a cool, dry and dark room to avoid the danger of tire water accumulation. Due to pressurization, liquid may enter the carcass layer through the inner airtight layer of the tire, resulting in sudden damage to the tire. When buying tires, the storage environment of tires can also be used as an aspect of inspecting tire shops.