Can the wheel size of a vehicle be modified?
2 Answers
If the modification of the wheel hubs is not approved by the traffic management department in advance, it is illegal and the vehicle will not pass the annual inspection. The size of the car's wheel hubs cannot be modified. Doing so is illegal, and if caught on the road, you may face fines and vehicle seizure. Vehicles cannot be altered arbitrarily, and it is advised not to change the wheel hub size. Modifying the wheel hub size can lead to decreased power, reduced vibration absorption, increased fuel consumption, and is also illegal. Therefore, it is best not to make such changes. If you wish to change the body color, model, performance, purpose, or structure of the vehicle, or replace the frame, body, or engine, the owner must apply to the vehicle management office for a modification registration.
You can certainly change the wheel size, but this shouldn't be done too casually. My neighbor switched to 19-inch large wheels last year, and ended up with two tire punctures within two weeks. Modifying wheels requires considering the vehicle's structural tolerance—for instance, the suitable sizes differ between SUVs and sedans. You also need to accurately calculate the new wheel's J-value; otherwise, the tires might protrude beyond the body and easily scrape the fenders. I recommend consulting a professional modification shop to measure the original parameters, ensuring the wheel diameter change doesn't exceed 2 cm for safety. The braking system could also be affected, requiring readjustment of the caliper position. Additionally, the tire aspect ratio needs to be modified accordingly; otherwise, the speedometer will be inaccurate. Although regulations allow minor modifications, oversized wheels will definitely fail the annual inspection.
