1. What is the Bike Speed Equation?

The bike speed equation estimates speed in miles per hour based on power output (watts) and resistance (newtons). It provides a theoretical calculation of cycling speed under ideal conditions.

2. How Does the Calculator Work?

The calculator uses the bike speed equation:

Where:

• \( Watts \) — Power output in watts (W)
• \( Resistance \) — Total resistance in newtons (N)
• \( 0.621371 \) — Conversion factor from m/s to mph

Explanation: The equation calculates speed based on the relationship between power and resistance, with a square root function to account for non-linear aerodynamic drag.

3. Importance of Speed Calculation

Details: Understanding the relationship between power and speed helps cyclists estimate performance, plan training, and set realistic goals for races or events.

4. Using the Calculator

Tips: Enter power in watts and resistance in newtons. Both values must be positive numbers for the calculation to work.

5. Frequently Asked Questions (FAQ)

Q1: What factors affect cycling resistance?
A: Resistance includes aerodynamic drag, rolling resistance, and gravity (on hills). This calculator simplifies it to a single resistance value.

Q2: How accurate is this calculation?
A: It provides theoretical speed under ideal conditions. Real-world speed may vary due to wind, road conditions, bike efficiency, and rider position.

Q3: What's a typical resistance value?
A: On flat ground, total resistance might range from 5-20N depending on conditions and bike/rider aerodynamics.

Q4: Can I use this for e-bikes?
A: Yes, if you know the total power output (human + motor), though motor efficiency factors may affect real-world results.

Q5: How does weight affect the calculation?
A: Weight primarily affects resistance when climbing hills. This calculator uses total resistance regardless of source.