Chart standing · US
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About
The ultimate motorcycle gearing analyzer for riders, mechanics, and tuning enthusiasts. Calculate exact speed at any RPM, visualize shift points, and compare sprocket combinations — all in one powerful tool. DIAL IN YOUR GEARING Enter your gear ratios, primary drive ratio, sprocket sizes, and tire dimensions. Drag the RPM slider and instantly see your speed in any gear on beautifully animated gauges. Switch between km/h and mph with a single tap. INTERACTIVE GAUGES & GRAPHS Live RPM tachometer and speedometer with real-time needle animation Gear Ratio / Shift Point graph showing RPM drop and speed at each shift Sprocket Spread graph to discover equivalent ratio combinations Compare Sprockets chart for side-by-side visual analysis SHIFT & TRACE Set your shift RPM, hit Trace, and watch the app animate through every gear — recording shift points, RPM drops, and speeds. Choose Shift At or Shift To modes. Adjust animation speed from slow-motion to lightning fast. Enable repeat to loop continuously. COMPARE EVERYTHING Toggle Compare Sprockets to add a second front/rear sprocket set. The speedometer shows two needles simultaneously so you can see exactly how a sprocket swap changes your speed in every gear. Compare tire sizes too — see the effect of a different tire diameter on your final drive. COMPLETE DATA TABLES Scrollable speed/RPM tables show calculated speed for every gear at every RPM increment. Customize max RPM range and increment steps. Compare tables appear automatically when comparison mode is active. SAVE & EXPORT Save unlimited bike configurations and switch between them instantly. Export a comprehensive PDF report with all input data, speed tables, shift point analysis, and sprocket comparisons — perfect for sharing with your mechanic or posting in forums. BUILT FOR RIDERS Whether you are choosing sprockets for the track, optimizing street gearing for highway comfort, or just geeking out over drivetrain math — this app gives you every number you need. Supports 3 to 8 speed transmissions, any tire size, and any primary drive ratio. No ads. No subscriptions. One purchase, full power.
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