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Motorcycle Gearing Calculator - RPM to Speed - Shift Tracer - Sprocket and Tire Comparison - Sprocket Spread Graph


RPM Max RPM

Primary Top Gear 4th 5th 6th 7th 8th ➊ ➋ ➌ ➍ ➎ ➏ ➐ ➑ Find Bike Data

km/h mph ↓ Tire → Compare R R Sprockets ↓ Compare Front / Rear / / Front Rear

Share Calculation

Shift → At To → RPM Slow Fast Saved Bikes

Sprocket Spread Graph - Sprocket combinations that vertiacly align are equal in ratio.

Front Sproc Scope Rear Sproc Scope Focus

Sprocket Spread Graph

Align Ratios

Enter gear ratios, primary ratio, sprocket sizes and tire diameter, then drag RPM slider to calculate speed from RPM.
Drag Max RPM slider to adjust the range of the RPM and Speedometer Gauges.

Enter Shift at RPM, select gear to shift to and hit Shift and Trace to run up through the gears recording shift point RPM and km/h - mph.

Check Sprockets Compare and enter alternate sprockets for comparison. The speedometer will display 1 needle for each sprocket set.
Or run Shift and Trace then hit Copy Diagrams to copy diagrams to page footer, edit and repeat to compare multiple combinations.

To calculate Chain Link adjustment to maintain rear wheel postition when changing sprockets, use our Chain and Sprocket Calculator