Extended Gear Inch & Shifting Pattern Calculator

An essential tool for cyclists interested in calculating Gear Inches & Sequential Shifting Patterns based on chainring & freewheel combinations.

  • About the Extended Cycling Calculator
  • Interpreting the Extended Data


  • Select the number of teeth on the CHAINRING_MAIN (cr_m), CHAINRING_HOST (cr_h) and CHAINRING_SLAVE (cr_s).

    cr_m           cr_h           cr_s


    Select the number of teeth on each of the FREEWHEEL cogs, entering "0" where necessary.


    Select your WHEEL DIAMETER in inches.


    Now let's push the submit button and see if it flys.

    or you could


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    jbarrm@panix.com