The speed rating on tires is an alphanumeric code that indicates the maximum speed a tire can safely maintain for a sustained period under specified conditions.
Speed ratings are designated by letters. According to the provided reference, each letter represents a speed between 75-186 mph.
Common Speed Rating Letters
The reference lists several common speed rating letters, including:
- L
- M
- N
- P
- Q
- R
- S
- T
- U
- H
- V
- W
- Z
Note: While each letter corresponds to a specific maximum speed, the reference indicates the overall range covered by these ratings is between 75 mph and 186 mph.
Why Speed Rating Matters
Choosing the correct speed rating is crucial for safety and tire performance. When buying new tires, choose a set that meets at least the minimum speed rating suggested by the vehicle manufacturer. Using tires with a lower speed rating than recommended can affect your vehicle's handling, stability, and could lead to premature tire failure, especially at higher speeds.
Finding Your Vehicle's Recommended Speed Rating
To find the appropriate speed rating for your vehicle, you should:
- Refer to your vehicle owner's manual. This is the definitive source for the manufacturer's specifications.
- Check the tire information placard, typically located on the driver's side doorjamb, glove compartment door, or inside the fuel filler door.
Selecting tires with the correct speed rating ensures they are designed to handle the speeds and performance capabilities of your specific vehicle as intended by the manufacturer.
