FixedGearCalc
Get your skit patch and ratio
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Archived App (Last seen on 10 Dec 2025)
This is an archived listing of the app previously available on the App Store.Although the app is no longer distributed by Apple, you can still view its description, screenshots, version history, ratings, and metadata for reference.
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About
Input your tire size, sprocket and chainring teeth and get your:
* Ratio
* Number of skid patches (also ambidextrous)
* Development
* Get your speed at a certain cadence
* Get the needed cadence for a certain speed
* Switch between metric and imperial
Currently tire sizes are from 622-20 to 622-56.
Sprocket teeth from 9 to 23
Chainring teeth from 29 to 59
Let me know if your desired gear is missing ^_^
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What's New in FixedGearCalc
1.0.1
May 27, 2024
* Added 622-30
