Meaning Of Tire Ratings

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Meaning Of Tire Ratings
Related Categories: Speed Rating Letters | Speed Ratings Explained | 91w | 225 45zr17 | H Speed Rating | Service Description Explained | Q Speed Rating | R Speed Rating | Z Rated | What Is Utqg
  • Understanding Speed Ratings

  • …in your tire size means? For example, the "Z" in 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…

  • Related Products: 91w | 225 45zr17 | H Speed Rating
  • What Does the UTQG Rating Mean?

  • …for tires the rating of most interest to consumers is the UTQG. However, this is also the rating with the least amount of consistency among manufacturers. It's important to realize that the Department of Transportation does not conduct these tests. The UTQG ratings are assigned by the tire

  • Related Products: Utqg 740 A A | Utqg | Treadwear Rating
  • What Does "ZR" Mean?

  • …W and Y speed ratings are both rated for higher speeds than 149 mph, 168 mph and 186 mph respectively, which makes them also Z-rated tires. V-speed rated tires are rated up to 149 mph, and since they aren't rated for over 149 mph, they are not Z-speed rated tires. What about a tire that has the…

  • Do my tires lose AIR pressure?

  • …ambient air temperature your tire pressure changes by 1 PSI (UP or DOWN)? Did you know that 3 PSI change could mean a 10% reduction in the load rating of your tire? It also means the increase of heat and rolling resistance, thus damaging your gas mileage! Keeping your tires "topped of"…

  • Speed rating versus grip => higher isn't necessarily better

  • …speed rating mean faster times and more grip? Will a Y-Speed Rated (186 MPH) tire be faster and grippier then a W-Speed Rated (168 MPH) tire? Not necessarily. Grip and performance depend on the tire's compound, bead construction and other attributes. A higher speed rating means the tire will deflect…

  • Related Products: Grip Rating

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