1. What is a Bike Gearing Speed Calculator?

Definition: This calculator estimates bicycle speed based on pedaling cadence, gear ratio, and wheel circumference.

Purpose: It helps cyclists understand how different gear combinations affect their speed at various pedaling rates.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( S \) — Speed (km/h)
• \( Cadence \) — Pedaling rate (revolutions per minute)
• \( GR \) — Gear ratio (chainring teeth ÷ cog teeth)
• \( WheelCirc \) — Wheel circumference (meters)

Explanation: The formula calculates how far the bike travels per minute based on pedaling rate and gear ratio, then converts to km/h.

3. Importance of Gear Ratio Calculations

Details: Understanding gear ratios helps cyclists select appropriate gears for different terrains and maintain optimal cadence.

4. Using the Calculator

Tips: Enter your cadence (typical 80-100 rpm), gear ratio (e.g., 50/12 = 4.17), and wheel circumference (standard road bike ~2.1m).

5. Frequently Asked Questions (FAQ)

Q1: What's a typical cycling cadence?
A: Most cyclists maintain 80-100 rpm, with 90 rpm being a common target for efficient pedaling.

Q2: How do I calculate gear ratio?
A: Divide the number of teeth on the chainring by the number of teeth on the rear cog (e.g., 50 teeth chainring ÷ 25 teeth cog = 2.0 ratio).

Q3: Where can I find my wheel circumference?
A: Measure the distance your bike travels in one wheel revolution, or use standard values (700c ~2.1m, 26" MTB ~2.07m).

Q4: Why convert to km/h?
A: Kilometers per hour is the standard speed measurement for cycling in most countries.

Q5: Does this account for hills or wind resistance?
A: No, this calculates theoretical speed on flat ground with no resistance. Actual speed will vary based on conditions.