How to choose tires correctly to avoid tire blowout accidents

Tire classification:

According to the tire structure, it is divided into radial tires and bias tires.

As the name implies, the angle between the carcass cord and the steel belt layer cord is like the meridian of the earth, hence the name radial tire. The carcass cord layers of bias tires are arranged crosswise, so they are called bias.

Why do we hear less and less about bias tires in the current market, and hear more about radial tires?

This is because bias tires have many limitations in terms of design. For example, the carcass of bias tires constitutes the basic skeleton of the tire, and the softness from the tread to the sidewall is consistent, and the rigidity is relatively large. The advantage is that when the truck is overloaded, the absolute load-bearing capacity is higher than that of radial tires, but the disadvantage is that the high rigidity causes strong friction between the crossed cords, making the carcass easy to heat up.

Therefore, the wear of the tread is accelerated. In addition, due to the layout of the cords, the tread and sidewall of the bias tire are strong, the comfort is poor, and the movement and friction between the cord layers are large at high speeds, which is not suitable for high-speed driving. Now it is gradually replaced by radial tires.

The cord layer of a radial tire is equivalent to the basic skeleton of the tire, and its arrangement direction is consistent with the meridian section of the tire. Compared with bias tires, the sidewall stiffness of radial tires is less than that of the tread, so when turning, the tire deforms due to the lateral force of the ground, thereby ensuring that the contact area of the outer tread remains basically unchanged.

It has high elasticity, good wear resistance, low rolling resistance, and its adhesion, cushioning and load-bearing capacity are all higher than those of bias tires. The only disadvantage is that it is easy to damage the sidewall due to its low side stiffness, and its current manufacturing cost is higher than that of bias tires.

Tire pattern selection:

The pattern of a tire determines the performance of a tire. If a tire becomes without a pattern, theoretically it can maximize the contact area and achieve optimal braking and acceleration performance.

However, due to the lack of patterns, the tires lose their drainage performance. When the vehicle drives on a wet road, a "water film" is formed between the tires and the ground, the tires lose grip, and the vehicle will be out of control. This is why the tires must be replaced before the tire pattern is about to wear out.

Some people may say that it would be better to design all tires with fine patterns, so that the grip is stronger and safer? Not really. Too many patterns will reduce the rigidity of the tread, and the tire will easily lose the stability of handling, which will also increase the danger.

Tire pattern style:

The tire pattern is also carefully considered at the beginning of its design. The longitudinal pattern is beneficial to the vehicle's driving stability, while the transverse pattern is beneficial to the vehicle's traction and braking performance.

Theoretically, a truck has front-wheel steering and rear-wheel drive. The front wheels are designed with longitudinal patterns, and the rear wheels are designed with transverse patterns, which perfectly utilizes the characteristics of the pattern. However, tires are used in a variety of scenarios, and it is impossible for all tires to be driven on roads with good adhesion. Therefore, the tire patterns will be combined with the usage scenarios and will be different.

Steering tires are designed with more longitudinal patterns to increase driving stability. The design of longitudinal grooves reduces the tire's contact area, which indirectly reduces vehicle fuel consumption. Auxiliary transverse patterns are designed to increase tire drainage and grip performance on complex road conditions.

The tires responsible for driving will be designed with more transverse patterns.

However, the application scope of these two types of tires is relatively narrow, and tires with comprehensive tread designs are more popular and have more diverse application scenarios.

Tire tread depth:

If the pattern is too deep, the elastic deformation of the pattern ground contact will be greater, resulting in greater rolling resistance, more fuel consumption, and the tire will tend to generate more heat and be more prone to blowouts. The roots of the patterns are also more prone to tearing and falling off due to the severe force.

If the pattern is too shallow, it will affect the safety performance of the tire, shorten the tire replacement cycle.

Special tires:

● Off-road tires

The tread grooves are wide and deep, the tread contact area is small, and the contact force of the tread is large, which increases the tire's grip. This is also the reason why the tire's rolling resistance increases, which increases tire wear and fuel consumption on good roads. In order to ensure wear resistance, the tire is harder, and the driving comfort on good roads is poor.

● Snow tires

The rubber formula of snow tires is different from that of ordinary tires. The rubber of ordinary tires will harden below 7 degrees Celsius, while the soft rubber of snow tires can ensure a good contact area in icy and snowy weather.

The fine and dense patterns of snow tires can more easily cut off water film and increase the contact between rubber and the ground. Like off-road tires, snow tires will greatly increase tire wear on good roads due to their soft carcass and fine patterns. The "better grip" on good roads will also increase fuel consumption.

As a rubber product, tires are subject to inevitable aging, but good driving habits can effectively prevent tire aging. For example, avoid exposing tires to the sun when the vehicle is parked, do not park the vehicle near a heat source, and clean tires in time when they come into contact with oil or chemicals.

Check tire pressure regularly. Tire pressure is an important factor affecting tire service life. Whether the tire pressure is too low or too high, it will affect the tire life and safety of use.

Wheel alignment. When wheel alignment is abnormal, it will lead to poor handling stability, abnormal tire wear, and affect safety of use. It is recommended to align the wheels regularly and adjust them in time.

In addition, when driving, keep a reasonable speed, clean up foreign objects on the tires in time, maintain good driving habits, and avoid overloading. Only in this way can we reduce the tragedy caused by tire failure.