Gear Ratio Calculator - Optimization
Calculate speed based on RPM, gear ratio, final drive, and tire dimensions.
🔧 TECHNICAL DATA: Performance, consumption, and specifications shown are THEORETICAL values based on manufacturer data or statistical averages. Actual values vary depending on driving style, conditions (weather, terrain, traffic), vehicle maintenance, and wear. For accurate data, consult the manufacturer's manual or have your vehicle evaluated by a professional.
Gear Ratio Calculator
Ou calculer depuis dimensions pneu:
Frequently Asked Questions
How does final drive ratio affect performance?
A short ratio (e.g., 4.10) gives more acceleration but less top speed and higher consumption. A long ratio (e.g., 3.07) favors economy and V-max.
What's the optimal RPM at 130 km/h?
Ideally between 2500-3000 RPM for economy. Above 3500 RPM, consumption increases significantly. Diesels can go as low as 2000 RPM.
How do larger tires affect speed?
Larger tires = more actual speed for the same engine RPM. This virtually lengthens gear ratios but slightly reduces acceleration.