GNCC's bike gear calculator.

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 Step 1: Enter number of gears:

Number of sprockets in the rear cluster (max: 11):   Number of chainrings (front, max: 3): 1 2 3   

Tips and notes:

• If you only know the high and low counts of a set, then just choose "2" for the number of gears;
• If any gear-teeth fields are zero or blank, then 0 will be generated for gear and speeds;
• Maximum numbers (11 and 3) are enforced, but no other data checking is performed. (So if you want to try a road race with an 11/30/50 3-speed and a 50 inch wheel, go ahead!)
• If you want an ' (apostrophe) in the optional title string, use the html character ' in its stead.

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Last updated: November 13, 2008.