Do I need to know my exact wheel size to use the Gearfinder calculator?

Yes, the tool requires wheel and tire parameters to provide realistic speed and distance calculations, as gear inches and speed outputs depend on the actual rolling circumference of your setup.

What is the difference between gear inches and metres travelled per crank revolution?

Gear inches is a relative measure of effort and speed, traditionally based on a 27-inch wheel, while metres travelled per crank revolution is a direct distance measurement used by cycling federations for junior gear restrictions; the site treats gear inches as a comparative guide rather than an exact measurement.

Can I compare multiple chainring and sprocket combos at once on Gearfinder?

The calculator allows you to select specific chainring and sprocket combinations to compare their gear ratios, inches, and resulting speed at various cadences, enabling iterative testing of different setups.

Is the Gearfinder bike gear calculator free to use?

Yes, the site explicitly offers the gear calculator service for free, and no paid plan is required to access its features.

SportsTool Review

Bike Gear Calculator

Provided byGearfindergearfinder.cc

The app lets you input chainrings and sprockets and compare gearing combinations in different display modes. It is in...

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Screenshot of Bike Gear Calculator on Gearfinder — gearfinder.ccOpen the live tool →

About this tool

What Bike Gear Calculator does

Bike Gear Calculator on Gearfinder.cc is a free, web-based tool for cyclists to explore and compare chainring and sprocket combinations. Users input their specific gear components to receive detailed output including gear ratios, gear inches, and speed calculations based on wheel and tire size. The results are designed to inform practical gearing decisions, helping riders understand the relationship between component choices, cadence, and potential speed, whether for track cycling or general road use. The site emphasizes that gear inches serve as a relative measure of effort rather than exact real-world measurements, acknowledging variations in modern tire sizes compared to traditional standards.

Step by step

How to use the Gearfinder Bike Gear Calculator

1
Select your chainring size using the slider control
2
Choose your sprocket size to see available gear combinations
3
Input or select your wheel and tire parameters for realistic speed and distance calculations
4
View the output table showing gear inches, metres travelled, and speed at various cadences

Is it right for you

Best for

This option suits cyclists—particularly track riders—who need to compare specific gear combinations and understand how different chainring and sprocket choices affect gearing, speed, and effort, all without cost or registration.

Limitations

Gear inch calculations traditionally assume a 27-inch wheel, which may differ from modern 700c standards
Results are relative measures of effort and speed, not precise real-world predictions
The site notes that tyre size significantly impacts actual performance and calculations may not match real-world measurements

Questions

Bike Gear Calculator FAQ

Do I need to know my exact wheel size to use the Gearfinder calculator?: Yes, the tool requires wheel and tire parameters to provide realistic speed and distance calculations, as gear inches and speed outputs depend on the actual rolling circumference of your setup.
What is the difference between gear inches and metres travelled per crank revolution?: Gear inches is a relative measure of effort and speed, traditionally based on a 27-inch wheel, while metres travelled per crank revolution is a direct distance measurement used by cycling federations for junior gear restrictions; the site treats gear inches as a comparative guide rather than an exact measurement.
Can I compare multiple chainring and sprocket combos at once on Gearfinder?: The calculator allows you to select specific chainring and sprocket combinations to compare their gear ratios, inches, and resulting speed at various cadences, enabling iterative testing of different setups.
Is the Gearfinder bike gear calculator free to use?: Yes, the site explicitly offers the gear calculator service for free, and no paid plan is required to access its features.

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