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 ...

Slamming your truck to get it in the weeds on low-pro rubber or jacking it up for big, knobby meats will throw your speedometer out of whack. Most custom-truck builders know this, but few do anything ...