Gearbox & RPM Calculator
Convertissez le régime moteur en vitesse à travers la boîte et le pont, comparez les rapports et comprenez leur effet.
✔ 100% free
Mobile friendly
⚡ No account
Loading tool…
Advertisement
The drivetrain equation
Road speed = engine RPM ÷ (gear ratio × final drive ratio) × wheel circumference. Short ratios give acceleration; tall ratios give lower cruise RPM and better economy.
- Speed (km/h) = RPM ÷ (r_gear × r_final) × wheel_circumference(m) × 0.06
- A lower final drive (e.g. 4.10 → 3.73) lowers cruise RPM and fuel use, but slows acceleration
- RPM drops when shifting up; the calculator shows speed per gear
FAQ
Le rapport est dans la boîte par vitesse ; le pont est la réduction finale. Total = rapport × pont.
Advertisement