Zr Meaning

…mph (W-speed rating) and 186 mph (Y-speed rating). In the above picture you'll see 91W to the right of the size. The W of the 91W means the above Yokohama Advan Neova is W-speed rated. Since Z means 149+ mph, any W- or Y-speed rated tire is Z-speed rated. You've got Z-speed rated tires after all.

…of the jargon means. For example O.E. stands for Original Equipment and Ser. Des. means service description. Other abbreviations associated with tires include: * PSI = pounds per square inch* AS = all-season* M+S = mud and snow* SL = standard load* ASY = asymetrical tread design* ZR = Z speed rating…