What does 180 55 r17 mean?
ZR 17 then: M/C (73W) Here is what these codes mean: 180 : The width of the tyre, expressed in millimetres. The aspect ratio (the sidewall height as a proportion of the tyre width). ZR : The R stands for Radial construction. ZR : The R stands for Radial construction. A ZR code refers specifically to radial tyres designed for high speeds. The bead-seat diameter of the wheel, expressed in inches (1 inch = 2.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.zr tires deliver precision and performance at high velocities, offering unparalleled grip and responsiveness, whereas r tires provide enduring reliability, comfort, and safety for everyday driving conditions.
What does the Z mean on 215 55zr17?
Speed rating Z While it nearly always means a high performance tire for high-performing sports cars, “Z” may actually appear in the middle of a tire’s size information. When it does, it represents either a maximum speed of more than 149 mph (240 kph) or 186 mph (300 kph). Q: What is the difference between r17 and zr17? A: ZR basically means the tire is adapted for speeds above 149mph. ZR tires includes the speed ratings V(149mph), W(168mph) and Y(186mph). The R stands for radial. Helpful?