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RPM Tire Size Calculator

Formula

To calculate the RPM of a tire:

$RPM = \frac{\text{Speed} \times 336}{\text{Tire Diameter}}$

Where:

$RPM$ is the Revolutions Per Minute of the tire
$\text{Speed}$ is the velocity of the vehicle in miles per hour (mph)
$\text{Tire Diameter}$ is the diameter of the tire in inches

What is RPM in Tires?

RPM, or revolutions per minute, is a measure of how many times a tire completes a full rotation in one minute. It is an important parameter for understanding vehicle dynamics and can affect fuel efficiency, speedometer accuracy, and overall vehicle performance. Tire size can significantly influence RPM; larger tires will have a lower RPM at the same speed compared to smaller tires.

Examples

Here are some examples of calculating tire RPM:

For a vehicle speed of 60 mph and a tire diameter of 30 inches:

$RPM = \frac{60 \times 336}{30} = 672 \text{ RPM}$

For a vehicle speed of 45 mph and a tire diameter of 24 inches:

$RPM = \frac{45 \times 336}{24} = 630 \text{ RPM}$

FAQ

Why is RPM important for tires?

RPM is important because it helps in understanding the rotation speed of the tires, which impacts various vehicle parameters including fuel efficiency, speedometer calibration, and overall vehicle performance. Accurate RPM calculations can help in optimizing vehicle performance and ensuring proper maintenance.