BikeCalc

BikeCalc gets a design refresh ahead of its 15th year anniversary! Access the old version here.

Development Meters

(x: chainring, y: sprocket)

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mm
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Learn how to use the original and most popular development meters calculator for cyclists

The following instructions aim to assist you in effectively using our development meters calculator, ensuring a more seamless and informed experience.

  1. Count the number of teeth on the front cog of your bicycle, and select this value in the picker labeled chainring.
  2. Do the same on your rear cog for the picker labeled sprocket.
  3. Measure in millimeters the thickness of your rear tire across its tread when inflated, and select this value in the picker labeled tire thickness.
  4. Do the same with the diameter of your rim up to its bead for the picker labeled rim diameter. Sometimes, a marking can also be found printed on the sidewall of the tire. If in doubt, please refer to our article explaining how these tire markings are designated.

For more information about development meters, please visit our article answering common questions from the community.