What is the 3% rule for tires?
The 3% rule states that when replacing tires, the new tire’s diameter should not differ from the original by more than 3%. This guideline helps maintain proper vehicle performance, safety system functionality, and speedometer accuracy. In many cases, you can use 265 tires on rims designed for 255 tires, but it’s crucial to check your vehicle’s specifications and consult with a tire professional. The 10mm increase is usually acceptable if your rim width supports it.It’s highly recommended to use the exact tire size recommended for your car. However, in a pinch the tire width and aspect ratio can be changed slightly and still fit on your rim. Although this will still work, keep in mind it may have adverse effects on the performance of your car.