What is zr rating

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This rating system, listed below, describes the top speed for which a tire is certified. It does not indicate the total performance capability of a tire.

As manufacturers made more tires that did not fit this category, it was necessary to better regulate performance at standardized speeds to ensure safety. W and Y limited speed symbols have been added as higher speed categories. Always consult the manufacturer for the maximum speed of Unlimited Z tires. For example:. Consult the tire manufacturer for maximum speed when there is no service description. Blog Categories Blog Home. Is your vehicle properly aligned?

How hot is the road? Have you ever had a flat repaired? Important Notice: The information provided above is derived from sources deemed reasonably reliable. Each letter in the speed rating represents a maximum speed based on a standard chart.

The main things to know: Generally, the higher in the alphabet a tire is rated, the better it will manage heat and faster speeds. The most common ratings are S and T sedans, minivans, light trucks ; H some passenger cars, sports cars, coupes, some light trucks ; N, P, Q and R light trucks ; and V, W and Y high-performance cars.

Most winter tires have Q, S or T speed ratings.