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Torque Ratio Formula:
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The torque ratio calculates the change in torque output when changing tire sizes. It shows how much your vehicle's effective torque changes with different tire diameters, affecting acceleration and overall performance.
The calculator uses the torque ratio formula:
Where:
Explanation: A ratio greater than 1 indicates increased torque but reduced acceleration, while a ratio less than 1 indicates decreased torque but improved acceleration.
Details: Calculating torque ratio is essential for vehicle performance tuning, ensuring proper gearing, maintaining speedometer accuracy, and optimizing fuel efficiency when changing tire sizes.
Tips: Enter both new and old tire diameters in inches. Both values must be positive numbers. The calculator will show the torque ratio, which helps understand how tire size changes affect vehicle performance.
Q1: What does a torque ratio of 1.1 mean?
A: A ratio of 1.1 means the new tires are 10% larger, resulting in 10% more torque at the wheels but potentially slower acceleration.
Q2: How does tire size affect speedometer reading?
A: Larger tires make the speedometer read slower than actual speed, while smaller tires make it read faster than actual speed.
Q3: Should I consider gear ratio changes with tire size?
A: Yes, significant tire size changes may require gear ratio adjustments to maintain optimal performance and fuel efficiency.
Q4: How do I measure tire diameter accurately?
A: Measure from ground to top of tire with proper inflation and normal load, or use manufacturer specifications for precise calculations.
Q5: Can this calculator be used for any vehicle?
A: Yes, the torque ratio calculation applies to all vehicles including cars, trucks, motorcycles, and ATVs when changing tire sizes.