The principle of modification is that as long as the tire size is the same as the original factory, the appearance can be changed at will. If the refitted tires with different sizes cannot be put on record, and according to Article 57 of the Regulations on Motor Vehicle Registration, if the shape of motor vehicle and the registered relevant technical data are changed without authorization, the traffic administrative department of the public security organ shall order it to be restored to its original state and impose a warning or a fine of not more than 500 yuan.