Bike Gear Ratio Calculator2026

Calculate bike gear ratios, cadence speed, rollout and gear gaps for road, mountain and commuter bikes, fully offline.

Bike Gear Ratio Calculator is built for cyclists, mechanics and bike upgrade users who need to check gearing before changing chainrings, cassettes, wheel size or tires.

The app works fully offline. No login is required, it does not connect to the internet, and it does not collect user data. Create multiple bike setups, calculate gear ratio, rollout distance, cadence speed and gear range, then compare climbing, cruising and commuting scenarios clearly.

Key features:

• Gear ratio and rollout distance calculation
• Reverse calculation for cadence, speed and wheel size
• Chainring and cassette combination comparison
• Gear gap and duplicate gear hints
• Climbing, cruising and commuting templates
• Road, mountain and commuter bike presets
• Local storage for favorite bike setups
• Unit switching and offline export

Use it to choose a cassette, tune compact gearing, plan climbing gears, compare upgrade options and record your personal bike configurations. All setups and calculation records stay locally on your device.