Setup math for cars and motorcycles.
Live workshop calculators. Your vehicle. Your spec.
Aero, gearing, dampers, strip ET, and tires for track-day drivers, riders, and independent shops. Labels switch with Metric or Imperial. Watch units and estimates.
2015 Subaru WRX · car · metric
Calculators
Results update as you type. No submit button.
Drag force and power vs speed. Density from sea level or altitude + temperature.
Speed per gear, overlap, RPM vs speed chart. Sprockets or axle ratio.
Damper curves, 1-DOF step response with independent compression and rebound plus rear-axle delay, and weight transfer.
Four-corner unequal A-arms. Drag the chassis pickups. Live roll centers, anti-dive, and anti-squat.
ET predictor, density altitude, trap RPM, launch load, and a local slip log. Not a dial-in.
Size decoder, overall diameter, speedo error. Rolling ≠ static.
Magic Formula Fy and Fx vs slip. B, C, D, E, surface presets, friction ellipse.
Helpers only. The main tools convert for you.
Starter presets
Ratios, tires, mass, Cd/area. Fields marked est. are estimates.