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  • Calculating the desired reduction.

    This is for a 26 inch tire. If you want this conversion for a different tire multiply you tire diameter by 3.14 then divide that by 12. Insert that # where I have 6.7.


    F=Desired MPH
    E=feet per hour
    D=Feet per Min.
    C=RPMS at the wheel
    A=Motor RPMs
    B=reducion needed

    Fx5280=E

    E/60=D

    D/6.7=C

    A/C=B
    Calculating your top speed.

    This is for a 26 inch tire. If you want this conversion for a different tire multiply you tire diameter by 3.14 then divide that by 12. Insert that # where I have 6.7.

    A= Motor rpms
    B= total ratio from motor to final sprocket
    C= rpms at the wheel
    D= feet per Min
    E= Feet per Hour
    F= Mph

    A/B=C

    Cx6.7=D

    Dx60=E

    E/5280=F
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