Hub Gear Calculator — Internal Hub Ratios
Calculate effective gear ratios for internal hub gear systems.
How We Calculate This
Hub Gear Calculation
Effective Ratio = External Ratio x Internal Multiplier
Each hub type has fixed internal ratios. The effective gear ratio is the external ratio (chainring/sprocket) multiplied by each internal ratio.
Frequently Asked Questions
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Last updated: 2025-02-20
All calculations are estimates. Always verify results and consult a professional bike fitter where appropriate.