Regularly changing your tires in pairs with the properly assigned tire and wheel size isn't going to impact your car at all. But what about if you want bigger tires? Or smaller ones? The short answer ...

If you've ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you've immediately screwed up your speedometer. This is, of course, annoying, but for modern cars ...

If you've ever performed any kind of driveline or wheel and tire swap, you're probably familiar with speedometer calibration. By stepping up to larger tires and/or wheels, the speedometer reads slow ...

So recently, I replaced my 2006 Honda S2000 with a 2007 Honda S2000. My new S2K did not come with stock rubber, and the rear tires are 5% larger than stock. The rear stock tires are 245/40ZR17, and ...