A cassette ratio calculator helps cyclists understand their gear range by comparing the number of sprockets to the total teeth on the cassette. This ratio is useful for evaluating drivetrain efficiency and gear spacing.
Formula
$$\text{Cassette Ratio} = \frac{\text{Total Sprockets}}{\text{Total Teeth}}$$
Where:
- Total Sprockets is the number of cogs on the cassette
- Total Teeth is the sum of all teeth across all sprockets
Example Calculation
For a cassette with 11 sprockets and 42 teeth on the largest sprocket:
$$\text{Cassette Ratio} = \frac{11}{42} = 0.26$$
This ratio helps compare different cassette configurations for climbing ability and top speed potential.
How to Use
- Count the number of sprockets on your rear cassette
- Note the total teeth count (usually found on the cassette specification)
- Enter both values and click Calculate
- The result shows your cassette ratio
Practical Applications
- Gear Range Analysis: A lower ratio indicates a wider gear range, beneficial for climbing
- Cassette Comparison: Compare different cassettes to find the best fit for your riding style
- Drivetrain Planning: Use the ratio when planning upgrades to your bike's drivetrain