Tire Speed Rating Explained

The speed symbol is part of a tire’s service description and should be checked against the vehicle and tire maker’s instructions.

Compare complete service descriptions

Do not pick a tire solely from its size. Read the load index and speed symbol together, and check front and rear requirements separately.

Avoid a casual downgrade

NHTSA material explains that a lower-rated replacement can reduce the vehicle’s tire speed capability. Consult the vehicle and tire manufacturers before any change.

Selected speed symbol reference

Put the answer to work

Start with the actual vehicle label or installed component. Then use our vehicle directory and comparison tools to narrow the research. Any missing condition should be checked with the manufacturer or a qualified installer.

Official and manufacturer references

• https://www.nhtsa.gov/vehicle-safety/tires