Estes Tire Speed Ratings
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    Speed ratings signify the "safe" top speed of a tire under perfect conditions.

    Q=99 MPH top speed (160km/h)

    S=112 MPH top speed (180km/h)

    T=118 MPH top speed (190km/h)

    U=124 MPH top speed (200km/h)

    H=130 MPH top speed (210km/h)

    V=149 MPH top speed (240km/h)

    Z=above 149 MPH top speed (240km/h and above)

    W=168 MPH top speed (270km/h)

    Y=186 MPH top speed (300km/h)

    Abbreviation explanation
    NW=narrow white

    OWL=outline white letters

    RWL=raised white letters

    BL=blackwall

    LT=light truck