We've explained dozens of times over the years the difference between P-metric and imperial tire sizes so we won't cover a whole lot of the same ground, but we really haven't published a conversion ...

Dear Car Talk: Can you tell me why tire sizes are designated as they are? If I understand correctly, we have metric, English and a ratio. Like, a “235-75R15” tire is 235 millimeters wide, has a ...

Choosing the right-sized tire for your car can be as simple as checking the tires already installed (or using our tire selector). You’ll also find the recommended tire size, as well as the speed and ...

I was talking to a friend about the tires I want to purchase for my '70 LeMans Sport. This led to a heated discussion (and a bet) about tires and how their sizes are rated. My friend says a P235/50R15 ...

In our Tire Talk forum, some of our readers have questioned the interchangeability of P-metric and Metric tire size designations. But answering this question is like asking how to solve the national ...