Automobile hub is one of the most common modified parts of automobile. For many friends who like cars, the performance of a car is the beginning for them to follow a magic car. However, these cars don't seem to be very practical in daily life. Because of the different positioning, we have to choose a more practical family car. The dimensions of large-size wheels are divided into diameter and width, and most of them value the former. Due to the limitation of wheel arch and wheel arch, it is necessary to reduce the flatness after replacing the big wheel hub to ensure that the tire circumference (diameter) is close, and the torque will not be destroyed, so that the tire can be installed smoothly. The biggest advantage of changing big wheels is strong sensory stimulation, but this is only practical with wide tires. Most of the big wheels will increase the tire width and even become negative wheels, which are widely used in off-road vehicles. Secondly, the flatness of the tire becomes smaller, the heating rate at high speed is low, and the pressure change is small. Therefore, cars with large wheels, wide tires and low flatness pay more attention to road performance. On the contrary, off-road vehicles like practical high-grade tires, and even have central air pressure adjustment, so as to climb over vertical walls or cross sand to decompress. The above are the types of modified tire rims. Let's talk about the purpose of modifying the rim first. On the premise of not changing the diameter of the tire, refitting the steel rim tire (which can be understood as factory refitting) will give a very dynamic feeling to the senses and vision, at least make the car tend to move in momentum, and the achieved effect can also be felt, that is, when cornering, it will feel stronger support and ease the roll. Widening the tire width and changing the tire diameter will increase the ground contact area of the tire, that is to say, increase the grip of the car, which has great influence on the acceleration, braking and driving stability of the car. If the car accelerates before the tire is widened, it will scratch the tire, but after the tire is widened, this situation will be reduced and the power output of the car will be more direct and efficient. However, this is an ideal situation. Although widening tires has brought stronger grip on the ground, it is necessary to consider whether the engine power is sufficient, whether the output shaft can withstand such a strong torque and whether the shaft gear can withstand such a large stress before modification. In fact, it is allowed to change the tire diameter within a certain range. Some manufacturers will also provide different specifications of tire rims for car owners to choose from. This situation has little effect on the car, but it may not be so considerate to modify it yourself. In this way, the tachometer, fuel gauge and mileage will be seriously out of balance. The change of tire circumference has a great influence on the car, but the electronic components cannot be monitored. In short, friends who are interested in the modification of automobile wheels should try to find the size specifications suitable for their cars before modifying tire rims, so as to have more fun playing with cars.