TYRE SPEED REFERENCE
Tyre Speed Rating Conversion Chart
Tyre speed-rating letters indicate the maximum speed capability of a tyre under specified test conditions.
Always use the correct specification. A replacement tyre should meet the vehicle manufacturer’s required speed and load ratings. The chart is a reference, not permission to drive at the listed maximum speed.
Tyre Speed Rating Table
Find the speed-rating letter printed after the load index on the tyre sidewall and use the table below to identify its rated maximum speed.
| Speed Symbol | Speed in MPH | Speed in KMH |
|---|---|---|
| M | 81 mph | 130 kmh |
| P | 93 mph | 150 kmh |
| Q | 99 mph | 160 kmh |
| R | 106 mph | 170 kmh |
| S | 112 mph | 180 kmh |
| T | 118 mph | 190 kmh |
| H | 130 mph | 210 kmh |
| V | 150 mph | 240 kmh |
| W | 169 mph | 270 kmh |
| Y | 187 mph | 300 kmh |
| ZR | over 150 mph | over 150 mph |
The original ZR entry uses mph in the KMH column and needs verification.
Important: Road-speed limits, vehicle limits, tyre condition, pressure, load and operating conditions all apply regardless of the tyre’s speed rating.
How to Use a Speed Rating
The speed rating is only one part of the tyre specification. Match it with the correct tyre size and load index, and follow the vehicle manufacturer’s minimum requirement.
Example: A marking such as 225/45 R17 94W includes the speed rating W. The letter does not describe everyday driving speed; it is the tyre’s tested speed category.
Do not downgrade blindly: Some vehicles require a particular speed rating because of their weight, performance or original approval. If you are unsure, check the handbook or ask us to verify the specification from the registration.
Need Help With a Replacement Tyre?
Call or message us with your registration and tyre size and we can help identify the correct specification.