If you've ever modified a car with smaller or larger tires or, perhaps, a different final-drive gear, you've immediately screwed up your speedometer. This is, of course, annoying, but for modern cars ...

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 ...

DETROIT (AP) — The speedometer on the Toyota Yaris says the tiny car can go 140 miles per hour. In reality, the bulbous subcompact's 106-horsepower engine and automatic transmission can't push it any ...

DETROIT — The speedometer on the Toyota Yaris says the tiny car can go 140 mph. In reality, the bulbous subcompact's 106-horsepower engine and automatic transmission can't push it any faster than 109.

Q: The top speed on my car speedometer is 130 mph, yet the car cannot go anywhere close to that speed. So why does the speedometer go so high? Is it a marketing gimmick or is there some other reason?

Apple recently revealed a new version of its CarPlay system for vehicles, which include gauges like speedometers. But even Apple, the company that cast aside tradition when it reinvented phones, music ...