If you own a car, you also own at least four tires—five if you’ve got an actual full-size spare in the trunk instead of one of those humiliating donuts. At every level from single-car owner to tire ...

The tires in your car are consumable and require periodic replacement. Balding tires or those with worn-out treads are dangerous and not deliver the same levels of traction and braking as newer rubber ...

While the colored lines found on new tires are optional, follow along to see what they mean, and why they are there.