Disclaimer

Last updated: September 2026. Please read this page carefully before using our calculators.

Educational information only

All content on BikeGear — calculators, articles, tables, and examples — is published for general educational purposes. It is not gearing advice and is not a substitute for a qualified professional. We are not a bike fitter for position and knee issuess, and no client or advisory relationship is created by your use of this Site.

Gearing math assumes accurate wheel and tire diameters — tire models shift real rollout by a few percent. Knee pain is a fit and cadence problem before a gearing problem; spinning easier gears at higher cadence is the standard advice.

Gear comparisons across bikes assume similar crank lengths and rider power. Fixed-gear riders: brakeless riding is a skill and legal question of its own.

Accuracy of calculations

We implement well-known, publicly documented formulas (see the methodology section on each calculator page and standard cycling-geometry conventions (gear inches, development) as applicable). Even correctly implemented formulas produce estimates that depend on your inputs and assumptions. Real-world outcomes vary. Do not rely on a single web tool for a consequential decision.

Advertising disclosure

BikeGear is funded by display advertising served through Google AdSense. Advertisers have no influence over our content, formulas, or editorial choices, and placement of an ad is not an endorsement.

Errors and corrections

If you spot an error, please email hello@bikegear.app with the inputs you used. Verified corrections are published promptly.