The secrets behind tires: five little-known facts that will surprise you!

Everyone knows that the four wheels of a car are equivalent to the two legs of a person, and they are the most important parts of the walking process. For those of us who deal with tires every day, do you really know the knowledge of tires?

The world's largest tire
On October 11, 2022, the Fengshen meridian engineering giant tire 59/80R63 was successfully rolled off the production line at the Jiaozuo base of Fengshen Tire, a subsidiary of Sinochem. The giant tire that was successfully rolled off the production line was independently developed and produced by Fengshen Tire. The diameter is more than 4 meters, which is equivalent to the length of a family car; the weight is nearly 6 tons, which is equivalent to the weight of 3 family cars. It is mainly used for giant mining dump trucks of about 400 tons.

The spare tire does not last long

The affectionate male second in the TV series will never leave the female protagonist, but even if the spare tire of the car is not used, it will miss the validity period due to rubber aging and other reasons. The tire business here recommends that you: regularly check spare tires and do not put them together with corrosive items; spare tires also have a lifespan, and the general aging period is 4 years; because spare tires are used less frequently and have different friction coefficients with the other four tires, they are not suitable for long-term use.

The world's first tire is white
Because the natural color of rubber is white, the world's first tire is white. Subsequently, the color of automobile rubber tires was not fixed due to different additives. By 1915, due to the high-temperature condensation process of carbon elements and hydrocarbons, rubber showed a pure black color like ink, and its wear resistance reached an unprecedented level. Since then, rubber tires have entered a long period of black dominating the world.

Are run-flat tires not "explosion-proof"?
Explosion-proof tires are another name for "run-flat tires" on the market. There is no explosion-proof tire in the current automobile tire market. There is no particular difference in structure between explosion-proof tires and ordinary tires. They are just reinforced on the tire sidewalls, which allows the tire to continue to support the car with this solid sidewall in the event of air leakage or sudden loss of pressure. However, it is safer than ordinary tires!

The car will also "tremble"? It's because of poor dynamic balance!
Sometimes when driving at high speed, the steering wheel will vibrate inexplicably, and the wheels will also show abnormal shaking at the same time? What's going on? It is recommended to check the dynamic balance!

The tire and the wheel are not in a perfectly symmetrical state. For example, collision and extrusion during driving, uneven wear and deformation, etc., cause poor dynamic balance. Therefore, it is necessary to use a balancing machine to test the balance of the tire and the rim in motion.

Use balance blocks at the unbalanced point to ensure the balance of the tire operation. This will achieve smooth driving and avoid shaking.

There is a basic standard for dynamic balance. Put the tire on the balancing machine when it is inflated, and the range of 0-5 grams is considered "safe". There is no need to do dynamic balancing within this range. Exceeding this range means imbalance and needs to be adjusted.

When should the tire be replaced? Nothing works, just look at the wear mark!

Generally speaking, each tire manufacturer will have a recommended tire service life, and it is safe to use the tire within this time. However, in many cases, whether the tire can continue to be used is not directly linked to the tire's service life. It is the most scientific and safe approach to determine whether to continue to use the tire based on the tire's wear mark.

The tire with normal air pressure feels a little flat?
Because most cars now use vacuum tires, it is normal to feel a little flat under the weight of the car. When we are sure that the tire pressure is fine, it is normal even if it looks a little flat. So don't just think that your car should change tires again! The normal tire pressure of a general car is 2.2bar for the front wheel and 2.5bar for the rear wheel, which will increase by about 0.3bar after driving for a period of time.