The advantage of changing the first tire is that it increases the friction between the tire and the ground, and the car has stronger grip and is more stable and comfortable. The better the corresponding handling, the shorter the braking distance of the car, the higher the safety, and the less likely the car will slip. The disadvantage is that due to the increase of friction, fuel consumption will increase and acceleration will be slower. And the price is more expensive than a small tire, and there will be a lot of tire noise. In reality, it is very likely that the tires will not pass the annual inspection because of modification. Therefore, it is recommended not to replace it at will.
Usually, many drivers modify larger tires just to increase the friction between the vehicle and the ground. The purpose of increasing the grip is to improve the power of the engine, which requires more friction. Therefore, the No.1 tire is generally a vehicle with a modified engine. There is no need to change the tire of an ordinary car to one inch, because it will not help the car except increasing fuel consumption.