Q: What would be more accurate, my vehicles speedometer or a GPS I have on my dashboard? A: They both can be accurate and inaccurate. Speedometer: Aftermarket modifications, such as different tire and ...

Speedometer: Aftermarket modifications, such as different tire and wheel sizes or a change in the differential gearing, can cause speedometer inaccuracy. GPS: These devices are positional speedometers ...

The inaccuracy of the speedometers used by most vehicles, even those in cars with the coolest gauge clusters, is well known. The good news is that most speedometers report speeds higher than the ...

Modern cars surround drivers with digital certainty, yet one of the most basic numbers on the dashboard is quietly biased in your favor. The speedometer is designed to err on the side of reading high, ...

A recent update to Google Maps has allowed motorists to see their live speed, similar to the function already offered by the navigation app Waze. If you're new to apps with a GPS speedometer, you may ...

You may be driving faster, or slower, than you think you are. Speedometer inaccuracies happen, and can be partially to blame for that seemingly bogus speeding ticket. Dan Edmunds, an automotive ...