A tire’s speed rating indicates the maximum sustained speed it can handle under standardized test conditions. It’s shown on the sidewall after the size and load index (e.g., 225/45R17 91W). Select a rating that meets or exceeds your vehicle’s requirements—never lower than stock.
| Code | Mph | Km/h |
|---|---|---|
| R | 106 | 170 |
| S | 112 | 180 |
| T | 118 | 190 |
| U | 124 | 200 |
| H | 130 | 210 |
| V | 149 | 240 |
| Z (ZR) | over 149 | over 240 |
| W | 168 | 270 |
| Y | 186 | 300 |
Notes: “ZR” indicates high-speed capability (typically V/W/Y). “(Y)” markings indicate tested above 186 mph (300 km/h). Follow vehicle manufacturer recommendations.
Check your current speed rating on the sidewall and match or exceed it when changing sizes. Planning a size change? Compare overall diameter and revs per mile with our tools: Plus/Minus Sizing Calculator, Tire Size Comparison Calculator, and Wheel & Tire Size Calculator.
Upsizing to performance tires may change section width and wheel specs. Review fitment basics before you buy: Wheel Offset Explained and Custom Wheel Backspacing. Preview style and stance in our Wheel Visualizer.
Speed rating works together with load index and inflation. Always meet or exceed OE load and speed specs: Tire Load & Speed Ratings and Tire Load Ratings. See also Tire Ply Ratings Explained.
From daily commuting to high-performance driving, our specialists will match speed rating, load index, and size for your vehicle and use case. Want a turn-key solution? Choose a Wheel & Tire Package—mounted, balanced, and TPMS-ready—or request a Custom Built Wheel.
Questions about speed ratings or fitment? Contact Us. Ready to shop? Shop Tires or Shop Wheels. For sensor service on wheel swaps, see TPMS Service.
Reviewed by the Performance Plus Tire Fitment Team.
