What are the new regulations for wheel modification dimensions?

[Serena]

According to the new regulations for wheel modification, only the style can be changed, not the size. Large wheels cannot be replaced, but the style of wheels of the same size can be modified. Wheel maintenance methods: When the vehicle is in a humid area, the wheels should be cleaned frequently to prevent salt from corroding the aluminum surface. If necessary, after thorough cleaning, wax can be applied to the wheels to maintain their shine. When the wheels are hot, they should be allowed to cool naturally before cleaning. Do not use cold water for cleaning, as it may damage the aluminum wheels, cause deformation of the brake discs, and affect braking performance. Using cleaning agents on the wheels may cause chemical reactions on the surface, leading to loss of shine. Precautions for replacing car tires: When selecting tires, the specifications must be the same as the previous tires and must match the other tire on the same axle, including speed rating, load index, tread pattern, brand, size, etc., to ensure safe driving. The valve stem should also be replaced because the aging cycles of new tires and old valve stems differ. During the lifespan of the new tires, the valve stem may develop issues, which are not easily noticeable. Therefore, it is best to replace the valve stem when changing tires. Installation direction and inflation: If using the original factory tires, follow the manufacturer's installation instructions. For non-original tires, the side with the production date usually faces outward. For directional tires, align the arrow on the wheel with the direction of the car's forward movement. During inflation, fill the tire to the maximum allowed pressure first, then reduce it to the manufacturer's recommended standard pressure.