Can the modification from 17-inch to 18-inch wheels be approved for registration?

[VanBrielle]

Modifying from 17-inch to 18-inch wheels cannot be approved for registration as it constitutes illegal modification. Impact of increasing wheel size: The vehicle's mileage will also decrease because mileage is calculated based on the number of wheel rotations, which may affect maintenance cycle judgments. Permissible vehicle modification scope: The vehicle model, engine model, and frame number cannot be modified, and the body structure must not be altered. Changing the vehicle color, replacing the engine, body, or frame requires inspection of the vehicle. For engine, body, or frame replacements, a motor vehicle safety technical inspection certificate must also be submitted. Installing windshields, radiators, toolboxes, spare tire racks, front and rear anti-collision devices, or adding interior decorations requires registration of modifications.

[DiPreston]

I've been thinking about upgrading my car's rims from 17 inches to 18 inches recently, mainly to make the car look cooler. But the registration part is really troubling. I inquired at the vehicle management office, and they said that if the rim size doesn't match the original registration, it's basically impossible to get it approved. The regulations require that vehicle specifications cannot be altered arbitrarily. Changing the rims might make the speedometer inaccurate, leading to speeding tickets and potential safety hazards. When modifying, it's crucial to ensure that the overall tire diameter doesn't change too much—keeping it within 3% is considered safe. However, during the inspection, they'll reject it just for the size discrepancy. If you really want to proceed, try fitting matching tires first, but most experiences suggest it's a futile effort—it won't pass registration, and the annual inspection will be troublesome. It might be better to keep the original setup, saving both hassle and money.

[QuinnFitz]

As a car enthusiast who frequently engages in modifications, I believe that upgrading from 17-inch to 18-inch wheels often fails to pass inspection. Increasing the wheel size not only affects the vehicle's balance but also amplifies the speedometer's inaccuracy, which violates traffic regulations, making approval difficult. I attempted this modification to enhance handling, but the DMV rejected it outright due to the size discrepancy with the original specifications. When modifying, it's essential to pair the wheels with appropriately sized low-profile tires to minimize changes in overall diameter, but inspections only consider the original data. Additionally, after modification, the wheels may protrude beyond the body, increasing the risk of scraping. I recommend checking local policies online before making changes—some areas may be more lenient, but most enforce strict regulations. It might be better to focus on other minor, legal modifications like vinyl wraps, which are simpler and hassle-free.

[LeZoe]

Upgrading wheel size, for example from 17 to 18 inches, will likely fail the vehicle registration process. During inspection, the DMV checks against the registration certificate, and any size mismatch will cause rejection. This seemingly minor modification carries significant risks - inaccurate speedometer readings may show lower values than actual speed, increasing accident risks, and insurance claims could be denied. Before modifying, ensure tire specifications match and keep diameter differences within permitted limits. Avoid the hassle of restoration after failed registration attempts - it's simply not worth the trouble.