Bike Speed Calculator Mph

Bike Speed Formula:

\[ Speed = \frac{(cadence \times chainring \times \pi \times wheel\_diameter)}{(rear\_cog \times 1056)} \]

Cadence:

rpm

Chainring:

teeth

Wheel Diameter:

inches

Rear Cog:

teeth

Speed:

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1. What is the Bike Speed Formula?

The bike speed formula calculates your cycling speed in miles per hour based on your pedaling cadence, gear ratios, and wheel size. It helps cyclists understand how different gear combinations affect their speed.

2. How Does the Calculator Work?

The calculator uses the bike speed formula:

\[ Speed = \frac{(cadence \times chainring \times \pi \times wheel\_diameter)}{(rear\_cog \times 1056)} \]

Where:

\( cadence \) — Pedaling rate in revolutions per minute (rpm)
\( chainring \) — Number of teeth on front chainring
\( wheel\_diameter \) — Wheel diameter in inches
\( rear\_cog \) — Number of teeth on rear cog
1056 — Conversion factor to get mph

Explanation: The formula calculates how far the bike travels with each pedal revolution based on gear ratios and wheel size, then converts this to miles per hour.

3. Importance of Bike Speed Calculation

Details: Understanding this relationship helps cyclists choose appropriate gears for desired speeds, optimize training, and plan rides more effectively.

4. Using the Calculator

Tips: Enter your cadence in rpm, chainring and rear cog tooth counts, and wheel diameter in inches. All values must be positive numbers.

5. Frequently Asked Questions (FAQ)

Q1: What is a typical cycling cadence?
A: Most cyclists maintain 60-100 rpm, with 80-90 rpm being common for road cycling.

Q2: How do I measure my wheel diameter?
A: Measure from ground to axle and double it, or check your tire specifications (e.g., 700c is about 27 inches).

Q3: Does this account for tire pressure or rider weight?
A: No, this calculates theoretical speed. Actual speed may vary due to terrain, wind, tire pressure, and other factors.

Q4: What's the 1056 conversion factor?
A: It converts inches per minute to miles per hour (12 inches/foot × 5280 feet/mile ÷ 60 minutes/hour).

Q5: Can I use this for different wheel sizes?
A: Yes, just input the correct wheel diameter in inches for your bike setup.