A tool for calculating the bolt center diameter (BCD) of a bicycle's chainring and its gear ratios and mechanical advantage.

In your opinion, should the rear gears on the Gear Ratio Calculator be listed from smallest tooth count to largest tooth count, or as it currently is? I keep going back and forth on this.

UPCOMING CHANGES:

  • small UI tweaks;
  • reference page for tire ISO sizes;
  • reference page for how to find spoke lengths.
More information
StatusPrototype
CategoryTool
PlatformsHTML5
Authorfreswinn
Made withGodot
Tagsbcd-calculator, bicycle

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