Is it safe to fill your current tires with nitrogen instead of air? And why would you want to do that, anyway? A former ...

Admit it — the only time you pay attention to your car's tires is when one of them is flat. After all, it's easy to assume they're doing fine as long as they can get you from point A to point B. But ...

Under-inflated tires can contribute to an increased stopping distance, decreased grip on the road and poorer gas mileage.