Your car once had a rock-steady speedometer needle, but now it’s wandering a bit — or a lot. Maybe it’s not indicating any speed or it’s showing 60 mph and you know that can’t be right. “An easy way ...

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 ...

Just how the heck do I calibrate the speedometer on my bike? I installed it myself, set the computer for my wheel size, and cycled...I noticed that it detected the distance to my work as slightly ...