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Tires having a maximum speed capability over 149 MPH may have “ZR” in the size designation. Tires with a maximum speed capability over 186 MPH are required to include “ZR” in the designation. Below are examples of tire sizes with a “ZR” speed rating. ZR DESIGNATION
25 Σεπ 2020 · ZR-Rated Tires: The ZR rating (or Z rating) indicates anything above the V rating (168 mph), so it includes both the Y and W speed rating. Sports cars will often get the best handling with these tires.
A rating of “ZR” means that the tire actually has a speed rating of Z. Furthermore, this rating can be broken down further into three categories of V, W, and Y, which have different speed ratings themselves.
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. Get the information you need from our Tire Speed Rating Chart to purchase tires with a speed rating that is best suited for your vehicle.
7 Μαΐ 2023 · Built for High Speeds and Performance Driving: The Z in ZR tires means they’re made to handle high speeds. These tires have a speed rating of Z, which means they’re built to go over 149 mph (240 km/h).
The letters ZR on the sidewall relate to a tyre’s speed rating, which in this case is 150mph. That means it should not be driven at speeds in excess of 150mph (240kmph) - of course, where such speeds are even legal! Before 1990, ZR was used for high-performance tyres.
27 Νοε 2022 · Simply put, the symbol R indicates both the radial construction and the speed certified for 106 mph, while ZR tires used to be known as the over 149 mph speed rating tires. So keep in mind these notes to master your car.
