A review of tire knowledge, give your truck a pair of shoes!
For a tire that is one of the most important parts of a car, how to choose the right tire for the car is the number one problem for most car owners. I have compiled the knowledge about car tires today, let's take a look!
Tire selection and precautions
According to the model or specifications.
According to model or specification
Example: 185/70R1486H
185: tread width (mm)
70: flat ratio (tire height and tire width) (70 means 70%)
R: R means that the tire is a radial tire, and there is a rare bias tire, which is indicated by "D".
14: Steel ring diameter (inches)
86: load index (indicating the corresponding maximum load is 530 kg)
H: speed code (indicating the highest safety speed is 210 km / h)
Precautions
1. It is necessary to pay attention to the tire pattern, the pattern on the car tire, in addition to the aesthetic effect, it also has a great impact on the performance of the tire. For cars that require off-road and long-distance running, you can choose a large block pattern.
2. If you are not satisfied with the original handling of the vehicle, you can consider replacing the tire with lower flat ratio. For many models, one of the most effective ways to improve the appearance and handling of the vehicle is to replace the tire with low flat ratio.
3. When choosing tires, be careful not to mix different types of tires, such as tires that are more suitable for off-road vehicles, tires with general cars, or directional sports tires and A common tire wheel is used in combination.
Different types of tires for different purposes
4. In the purchase, we must try to avoid retreading tires. At present, some small street repair shops often sell some refurbished tires in order to sell them. Consumers must pay attention to the purchase. The method of identifying retreaded tires is simple: the most common is to observe the color and luster of the tires. The color and luster of the retreaded tires are relatively bleak, so don't blindly buy such tires.
5. In recent years, the trend of foreign automobile tires is to use tires with large width, large inner diameter and low flat ratio. At present, domestically produced cars use more tires with small width, small inner diameter and high flat ratio. The tire with a high flat ratio has a long sidewall, a strong cushioning capacity, and relatively high comfort, but has a poor feeling on the road surface and a weak lateral resistance during cornering. Conversely, tires with a low flat ratio and a large inner diameter have a wide tread and a wide tread. Therefore, the grounding area is large, the tire can withstand the pressure, the response to the road surface is very sensitive, and the lateral resistance during cornering is strong, so that the handling of the vehicle is greatly enhanced. However, the wider the section, the greater the friction between the tire and the ground, and the stronger the grip, but generally increases the fuel consumption.
How do you distinguish between tires such as bias tires, radial tires, and vacuum tires?
Simply speaking, the bias tire is a nylon tire; the radial tire is a steel tire; the vacuum tire has no inner tube, and the bias tire and the radial tire have both a vacuum tire and a non-vacuum tire.
Bias tire, radial tire, vacuum tire
Bias tire
The bias tire, also known as the ordinary structural tire, is an old-fashioned structure tire. The tire casing is composed of a tread, a ply (carcass), a buffer layer and a bead. The ply is the skeleton of the tire casing, and is used to maintain the shape and size of the tire casing, and is usually used for forming a double-layered multi-layer tape (cord). Rubber is laminated.
Bias tire
Skewed tires are commonly used tires in modern automobiles. Although they are used for a long time, the scope of use is very wide, and the production technology has a certain foundation. However, due to its unreasonable structure, it affects the development and will gradually be meridian. Replaced by the tide of globalization. This type of tire has good longitudinal rigidity and is suitable for driving at a moderate speed on ordinary roads.
Radial tire
The cords of the radial tires are not arranged alternately with each other, but are nearly parallel to the cross section of the tire, arranged like the meridian of the earth, the angle of the cord is small, generally 0°, and there is no maintenance point between the carcass cords, while the tire is running. The stress around the crown increases, causing circumferential extension and the carcass into a radial crack. Radial tire belt design is very important, it must have good rigidity, and can use multiple layers of high-angle, high-strength and non-stretchable fiber materials, such as steel wire or fiberglass.
Radial tire
Advantages of radial tires:
1. The grounding area is large, the adhesion performance is good, the tread slip is small, and the unit pressure on the ground is also small, so the rolling resistance is small and the service life is long.
2. The crown is thicker and has a hard belt layer, which is not easy to pierce; the deformation during driving is small, and the fuel consumption can be reduced by 3% to 8%.
3. Because the number of plies is small and the sidewall is thin, the radial elasticity is large, the cushioning performance is good, and the load capacity is large.
4. Good heat dissipation performance, can adapt to high temperature and high speed driving. Light weight, low rolling resistance and fuel saving.
5. The radial tire side is thinner, so it is softer and more elastic, reducing shock and noise.
Disadvantages of radial tires:
Because the sidewall is thinner, the crown is thicker, and a crack is likely to occur in the transition zone between the sidewall and the sidewall. The lateral deformation is large, resulting in poor lateral stability of the automobile, high manufacturing technology requirements, and high cost.
Vacuum tire
Vacuum tires are pneumatic tires without tube tubes, also known as "low pressure tires" and "inflatable tires". Vacuum tires have high elasticity and wear resistance, and have good adhesion and heat dissipation. In particular, all-steel radial tire tires are promoted to the logistics and transportation industry by the National Economic Commission and the National Tire Association due to their economic and durability.
Positive tire
Advantages of vacuum tires:
1. Anti-puncture = safety - vacuum tire surface is a layer of high-quality rubber, the external tension increases after inflation, forming a certain pressure on the inner surface, improving the self-sealing ability of the breach, once broken, unlike ordinary tires When the gas is completely exhausted in an instant, it will last for a certain period of time, ensuring safety during high-speed driving.
2. Super wear resistance = save money - vacuum tire rims are larger than ordinary rims and will not be affected by the heat of the brake drum during driving. Because there is no inner tube and lining, the tire is sealed with the wheel rim. When the vehicle is driving at high speed, the high temperature generated by the friction between the tire and the road surface, the internal (hot air) directly dissipates heat through the steel ring to quickly reduce the temperature of the tire, thereby extending the tire. The service life.
3. Low fuel consumption = make money - vacuum tires in the metric unit 315/80R22.5, 295/80R22.5, 275/70R22.5 are flat tires, the crown angle of the tire is zero, so the adhesion is strong. It can maintain good driving stability and less friction, which is good for shock absorption and speed increase. The positioning of the belt speed layer is high, the radial runout of the wheel is small, and the resistance is small. This saves fuel by 3%.
Trucks with tubeless tires are more wear-resistant, safer, more comfortable and more stable than ordinary tires.
Disadvantages of vacuum tires:
1. Not resistant to pressure, not suitable for overload, vacuum tire wear-resistant but not withstand pressure, but with the implementation of the national limit load limit policy, the frequency of use of vacuum tires may become higher.
2. Tubeless tires have good adaptability to tar and cement pavement, and can maintain strong adhesion even if there is water on the road surface, and have good stability. However, the soil surface, especially the muddy road surface, has low adhesion and poor stability. It is not advisable to drive on the dirt road in the suburbs.
3. Repairing is more troublesome. If the cost of high-vacuum tires is broken, it will be more troublesome to repair. The cost of repairing the vacuum tires is much higher than that of the inner tube tires.
Understand that so many tires are a bit dazzling? Do not mess, in fact, each tire brand has a different type of tire series, if you are not satisfied with which part of the vehicle when you change tires, you can prescribe the right medicine. Or you want to improve the driving experience of the car, you can also try to change the tires that meet your needs.
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