1. What is Wheel RPM?

Wheel RPM (Revolutions Per Minute) measures how many complete rotations a wheel makes in one minute. It's crucial for understanding vehicle performance, gear ratios, and speed calculations.

2. How Does the Calculator Work?

The calculator uses the Wheel RPM equation:

Where:

• \( \text{Speed} \) — Vehicle speed in feet per second
• \( \text{Tire Diameter} \) — Diameter of the tire in inches
• \( \pi \) — Mathematical constant (approximately 3.14159)
• 60 — Conversion factor from seconds to minutes
• 12 — Conversion factor from feet to inches

Explanation: The equation converts linear speed to rotational speed by considering the circumference of the wheel.

3. Importance of Wheel RPM Calculation

Details: Wheel RPM is essential for vehicle tuning, performance analysis, transmission design, and ensuring proper speedometer calibration.

4. Using the Calculator

Tips: Enter speed in feet per second and tire diameter in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: How do I convert mph to ft/s?
A: Multiply mph by 1.46667 to get ft/s (1 mph = 1.46667 ft/s).

Q2: Where can I find my tire diameter?
A: Check your tire sidewall markings or manufacturer specifications. It's often part of the tire size code.

Q3: Does wheel RPM equal engine RPM?
A: Only if there's a 1:1 gear ratio. Typically, engine RPM is higher due to gear reduction.

Q4: How does tire wear affect RPM?
A: As tires wear, diameter decreases, causing RPM to increase at the same speed.

Q5: Why is wheel RPM important for performance tuning?
A: It helps determine optimal gear ratios and shift points for maximum acceleration or fuel efficiency.