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Revs Per Km Formula:
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Revs Per Km refers to the number of revolutions a wheel makes to cover a distance of one kilometer. This measurement is important in various fields including automotive engineering, cycling, and industrial applications where wheel rotation and distance measurement are critical.
The calculator uses the formula:
Where:
Explanation: The formula calculates how many full rotations (revolutions) a wheel of a given diameter needs to make to cover exactly one kilometer.
Details: This calculation is essential for speedometer calibration, odometer accuracy, gear ratio calculations, and determining appropriate gear settings in cycling and automotive applications.
Tips: Measure the wheel diameter accurately in centimeters. For best results, measure from ground to center of axle and multiply by 2, or measure the full wheel diameter directly. Enter the value in centimeters.
Q1: Why is wheel diameter measurement important?
A: Accurate diameter measurement is crucial because even small errors in diameter measurement can result in significant errors in distance calculation over longer distances.
Q2: Should I measure with tire inflated or deflated?
A: Always measure with the tire properly inflated to the recommended pressure, as this affects the effective rolling diameter.
Q3: How does tire wear affect the calculation?
A: As tires wear down, their diameter decreases slightly, which means more revolutions are needed to cover the same distance. This may require recalibration over time.
Q4: Can I use this for different distance units?
A: Yes, the same principle applies. For miles, you would use 63,360 (inches in a mile) divided by the circumference in inches.
Q5: What's the typical revs per km for a car wheel?
A: A typical car wheel with 65 cm diameter would make approximately 490 revolutions per kilometer.