Speed Rating Letters

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Speed Rating Letters
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  • Tire Speed Ratings

  • …89S, the letter "S" would represent your tire speed ratings. But what does it mean? Tire speed ratings tell you how fast you can drive on your particular tires. Sounds crazy when you look at the numbers associated with speed ratings, but in Europe, some highways don't have speed limits and…

  • Understanding Speed Ratings

  • …168 mph, 270 km/h maximum speed. You can learn more about speed rating and the other letters and numbers on the sidewall of your tire in "How to Read Speed Rating, Load Index & Service Descriptions." Disclaimer: It is important to note that speed ratings only apply to tires that have…

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  • One of These Things is Not Like the Other!

  • …on with that? Tire manufacturers will give different part numbers to the same model of tires if the tires have a different sidewall styling, speed rating, load index or O.E. designation. These differences in the tires are enough to earn different part numbers and prices which are subject to the…

  • Related Products: Mo | Sidewall Style | Mercedes Mo
  • What's in a letter?

  • …stone up to a (Y) rated tire. Wait a minute!!! Y is higher than Z?? Yes it is! As you can see from the chart on this page, the speed rating letters don't exactly follow the alphabet. With certain vehicles now capable of running well over 150 mph, the need for higher speed ratings was necessary.…

  • Frequently Asked Questions

  • …feedback on this answer. What does speed rating mean and what is correct for my vehicle? In Germany, some highways do not have speed limits and high speed driving is permitted. Speed ratings were established to match the speed capability of tires with the top speed capability of the vehicles to…

  • What Does "ZR" Mean?

  • …bit about speed ratings. 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…


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