Rim Size Visualizer & Plus-Sizing Guide
Going up in wheel size changes your car's look — bigger rims with lower-profile tires fill the arch and look sportier. 'Plus-sizing' means increasing wheel diameter while reducing tire sidewall to keep the overall diameter roughly the same, preserving your speedometer accuracy. Use the guide below to see how sizes compare, then preview real wheels on your car in Car AI.
225/40R18
18" wheel · 40% sidewall
As wheel diameter grows, tire sidewall shrinks to keep the overall diameter constant — this is plus-sizing. The car looks sportier and fills the arch more, while the speedometer stays accurate.
Lower-profile tires (bigger wheels) generally mean a firmer ride and more vulnerability to potholes. Illustration only — confirm real fitment with a supplier.
FAQ
What is wheel plus-sizing?
Plus-sizing means fitting a larger-diameter wheel with a lower-profile tire so the overall tire diameter stays about the same. This improves the look and often handling response while keeping your speedometer accurate.
Do bigger rims ruin the ride?
Larger wheels with lower-profile tires generally give a firmer ride and less cushioning against potholes, in exchange for a sportier look and sharper steering feel. It's a trade-off to weigh for your use.
How do I see specific rims on my car?
Use Car AI's rim swap feature: upload a photo of your car and preview different wheel styles, colors and finishes photorealistically before buying.
Preview it on your own car
Car AI turns a photo of your car into photorealistic mods — wheels, paint, tint and more. Free to try on iOS.