1. What is a Bike Gear Ratio Calculator?

Definition: This calculator determines the gear ratio of a bicycle based on the number of teeth on the chainring and cog.

Purpose: It helps cyclists understand their gearing setup for optimal pedaling efficiency and performance.

2. How Does the Calculator Work?

The calculator uses the formula:

Where:

• \( GR \) — Gear ratio (unitless)
• \( Chainring \) — Number of teeth on front chainring
• \( Cog \) — Number of teeth on rear cog

Explanation: The gear ratio shows how many times the rear wheel turns for each pedal revolution.

3. Importance of Gear Ratio Calculation

Details: Proper gear ratio helps cyclists maintain optimal cadence, climb hills efficiently, and achieve desired speeds.

4. Using the Calculator

Tips: Enter the number of teeth on your chainring and cog. Both values must be greater than 0.

5. Frequently Asked Questions (FAQ)

Q1: What's a typical gear ratio for road bikes?
A: Common ratios range from 2.0 to 4.0, with higher ratios for speed and lower ratios for climbing.

Q2: How does gear ratio affect pedaling?
A: Higher ratios require more force per pedal stroke but yield more speed. Lower ratios make pedaling easier but slower.

Q3: What's the difference between gear ratio and gear inches?
A: Gear inches incorporate wheel diameter, while gear ratio is purely based on teeth count.

Q4: Should I use the same gear ratio for all conditions?
A: No, adjust based on terrain - higher ratios for flats/downhills, lower ratios for climbs.

Q5: How do I find my chainring and cog tooth counts?
A: The numbers are usually stamped on the components, or you can count the teeth manually.