Formula
The chain length is calculated using the following formula:
$$L = 2C + \frac{F}{4} + \frac{R}{4} + 1$$
Where:
- L is the chain length
- C is the chain stay length
- F is the number of teeth on the front chainring
- R is the number of teeth on the rear cog
Example Calculation
Given:
- Chain Stay (C) = 17 in
- Front Teeth (F) = 34
- Rear Teeth (R) = 24
Calculation:
$$L = 2 \times 17 + \frac{34}{4} + \frac{24}{4} + 1$$
$$L = 34 + 8.5 + 6 + 1 = 49.5$$
Result: The chain length is 49.5 inches.