Two key factors to pay attention to when using tires: air pressure and load

The main raw materials for tire manufacturing are rubber and skeleton materials (such as nylon cord, steel wire cord, etc.), and various materials exhibit different characteristic changes when temperature increases. Nylon cord, unlike other materials, shrinks under heat. High temperature can also accelerate the aging process of rubber, so we say that the main reason for tire damage is the high temperature of the tire body.

When the tire temperature is found to be too high, it is necessary to stop and cool down. This is because when the tire temperature reaches a high level, it will cause a decrease in the physical and mechanical performance of the rubber and ply cord, reduced adhesion of the rubber and ply cord, accelerated heat aging, and increased risk of tread separation, shoulder separation, and sidewall separation. It is also more prone to tire crown and shoulder blowouts under external impact.

● Air pressure

Tires should be inflated according to the prescribed standards, high or low air pressure can both cause early tire damage.

Low air pressure can have the following effects:

1. When a tire is underinflated, the deformation of the tire body increases and the tire heats up more easily, which can cause delamination of the tire body, breakage of the cord, and blowout of the bead.
2. Due to the high heat generated by the tire, the inner tube is more likely to be damaged.
3. When two tires are mounted side by side, the sidewalls of the adjacent tires can rub against each other and cause damage. If one tire is underinflated, it increases the load on the other tire and accelerates its wear.
4. When a tire is working under low pressure, the outer tire can shift relative to the rim, causing wear on the bead and detachment of the inner tube valve stem.
5. Insufficient air pressure can exacerbate abnormal wear on the tire tread and increase fuel consumption. According to data, if the air pressure is 10% lower than the standard pressure, the mileage of the tire will decrease by about 12%; if it is 25% lower than the standard pressure, the mileage will decrease by about 30%.

● Load

Overloading is a serious issue that can damage both the mechanical components and tires of a car. It causes an increase in deformation of the tire body, as well as an increase in the contact area with the ground, which leads to accelerated tread wear. The increased contact area also causes the tire to heat up quickly, resulting in premature damage.

Overloading can have a serious impact on the lifespan of vehicles and tires. It causes increased deformation of the tire body and increased contact area with the road surface, resulting in accelerated wear of the tire tread. The increased contact area also leads to rapid heating of the tires, causing premature damage.

The effects of overloading on tires include:

1. When tires are used beyond their rated load capacity, the areas of tire deformation increase, leading to higher tire temperatures and reduced tire lifespan. Overloading by 10% can decrease tire lifespan by around 20%; overloading also increases rolling resistance, with a 30% overload leading to a 45-60% increase in rolling resistance.
2. Cracking of the tread pattern.
3. Overloading causes increased deformation of the tire body, making it more susceptible to cord breakage and bead blowout.
4. When a tire is used beyond its standard load capacity, the deformation of the tire increases and its temperature rises, reducing its lifespan. If overloaded by 10%, the tire’s lifespan will decrease by about 20%. Overloading also increases rolling resistance; if overloaded by 30%, rolling resistance will increase by about 45-60%.