The basic formula for the job goes like this: New tire size divided by old tire size multiplied by speedometer reading equals actual mph. Not that difficult, but it only works for your head. Your ...

The wheels of a moving vehicle can move at different speeds, with some turning faster than others. This can cause a loss of steering control and compromise safety on the road. To mitigate this, speed ...

Fixing the speedometer on my Honda S2000, which as you can see clearly reads too high. While traveling at a GPS verified speed of about 80 to 81 miles per hour, you can see the car’s speedometer is ...