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Related Categories: R Speed Rating | H Speed Rating | 89h | Speed Rating | What Is V Rating | 225 45zr17 | Speed Rating Letters | Tire Psi Chart | Inflation Chart | Z Rated Tires
  • Understanding Speed Ratings

  • …Y 186 mph 300 km/h Exotic Sports Cars While a Z-speed rating still often appears in the tire size designation of these tires, such as 225/50ZR16 91W, the Z in the size signifies a maximum speed capability in excess of 149 mph, 240 km/h; the W in the service description indicates the tire's 168…

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