Tire speed rating indicates the maximum service speed for a tire.
Tire speed rating is found on tire sidewall as a part of tire size service description.
Tires can have different speed ratings, so it is important to choose the tire that is best suited for your vehicle. It is recommended to choose new tires with a speed rating at least equal to speed rating of your old tires. If you mix tires with different speed ratings, make sure you observe the lowest speed rating.
Tire speed rating is not a recommendation to exceed speed limits.
|Tire Speed Rating||Maximum MPH||Maximum KM/H|
W- and Y-speed ratings are subcategories of the Z-speed rating.
Tires with a maximum speed capability above 240 km/h (149 mph), a "ZR" may appear in the size designation. For tires having a maximum speed capacity above 300 km/h (186 mph), a "ZR" must appear in the size designation and a service description, including the Y speed symbol, must be included in brackets.
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