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 ...

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 ...

Vehicle speed (mph), engine speed (rpm), tire diameter (inches), trans gear ratio, and rear axle gear ratio are all interrelated. If you know four out of five of these values, you can determine what ...