We don’t just mind our P’s & Q’s around here, we also mind our NIB’s, NOS’ and OBO’s. In other words, we like abbreviations; they allow us to get information into an ad in a way that’s easy to quickly enter and simple for potential buyers to understand. Most of the abbreviations we come across (and use) are pretty self-explanatory, but there are a few that we use without really giving them much thought. Until now, that is.

A few months ago, we wrote about what, exactly, those numbers in tire sizes mean. But a series of recently submitted ads got us wondering: what about the letters? We often see LT or P or R in the ads we get for tires, and our curiosity was piqued.

Turns out the letters we most frequently encounter make a surprising about of sense (if we’d been hoping that the minds at Michelin and Goodyear had been conjuring up some kind of magical code, we’d be sorely disappointed). LT tells us that the tire is designed for use on a light truck. P? Passenger car. And that R that sometimes makes an appearance smack dab in the middle of the tire size indicates that the tire is radial