Passenger Cars
This section will help you understand tire types, tire sizing, tire dimensions, service descriptions, speed ratings and UTQG (Uniform Tire Quality Grading).

Learn about the difference between all-season tires, winter tires, performance tires and all-season performance tires, and the difference between “Euro-metric” and “P-Metric” tire sizes.

You can also understand the markings on the sidewall of a tire and how to interpret the vast amount of information contained on the side of a tire. Included on the sidewall, and described here, are speed ratings, service descriptions and UTQG information.