What Is Load Index

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What Is Load Index
Related Categories: Load Index | Load Index Chart | Tire Load Index | Service Description | 121 Load Index
  • What Does "ZR" Mean?

  • …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 description. Anything rated for more than 149 mph is considered a Z-speed…

  • What Does 'XL' Stand For?

  • …sidewall. An extra load tire will have a higher load index than a standard tire. For more information on properly understanding the letters and numbers on your tire's sidewall, read "Sidewall Markings." If your car normally uses a standard load tire, it is allowed to use an XL…

  • Tires As Shoes: Part One -- What Size Do I Have?

  • …as a Ford F250, you will also require a tire with a higher load index, or if you have a vehicle such as a Chevrolet Corvette, your car may have come with light load tires and going to a tire with a higher load index would make the vehicle ride firm. Next Post: Part Two -- What is the Tire's Purpose?

  • Related Products: Ford F250 | Load Index | F250
  • Tire Speed Ratings

  • …size? It represents the tire speed ratings. (If you aren't sure what your tire size is, just check the sidewall.) For example, if your tire size is 225/50R16 89S, the letter "S" would represent your tire speed ratings. But what does it mean? Tire speed ratings tell you how fast you can…

  • Speed Rating for Late Model Honda Accord

  • …their are many installers who have a policy not to install anything below what the car came equipped with from Honda. To gain a better understanding of speed ratings, take a look at "How to Read Speed Rating, Load Index & Service Descriptions." And, if you're considering H-rated tires…

  • Related Products: Honda Accord | Honda Accord Tires
  • Understanding Speed Ratings

  • …245/45ZR17 or the "H" in 205/55R16 89H. This letter is the speed rating of the tire. Tires are tested in laboratory conditions under load by tire manufacturers to determine the maximum speed capability of the tire. Shown below is what the speed rating letter equates to in MPH. L 75 mph 120…


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