4 new Falken FK452 high performance tires. Z speed rated The "Z" rating may appear on any tire rated above 149 MPH. Tires with "Z" ratings were originally thought to be to the highest rated tires a vehicle would require. However, the development of faster vehicles led to the production of two new speed ratings, "W" and "Y." These two ratings provide a better indicator of the tire's capacity for speeds higher than 149 MPH. The "Z," "W," and "Y," ratings appear on tires for sports cars, exotics, or other vehicles engineered for ultra-high speeds. size 255/40zr 19 Never run. Two unmounted and two mounted on new, never run Italian Fondmetal 19 inch rims. Italian Fondmetal 9X rims 8x19 38 mm offset 5 on 4.5 in/114.3 mm. Awsome set but sold the car. Will fit Lexus, Toyota, Nissan, Ford, etc. (check your size requirements) $400 Save 80% off what these cost.