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Related Categories: 245 40 R18 | 245 40r18 | 245 40 18 | Mercedes Winter Tires | Used Bridgestone Tires | 205-45r17 | Bridgestone Blizzak Mz-03 | Blizzak Run-flat | Rav4 Run Flat | 205 45r17 Run Flat
  • What Does "ZR" Mean?

  • …Speed ratings on tires are expressed in letters and are generally listed along with the load index for a tire after the size, for instance 245/40R18 93H. 93 is a load index and the "H" is the speed rating. Together, the load index and speed rating make up what is called the service…

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