Gravel Bike Gear Ratio Calculator
Calculate the gear ratio for your gravel bike based on the tire size, chainring, and sprocket.
Gravel Bike Gear Ratio Calculator
This calculator is preset with typical gravel bike specifications. Adjust the parameters to match your specific gravel bike setup and explore different gear combinations.
Bicycle Gear Ratio Chart
You can hover each gear combination to see the development, speed, and chain angle.
The gear ratio chart is only visible on a larger screen. You can find all the data in the table below.
Bicycle Gear Ratio Table
| 27 | 25 | 23 | 21 | 19 | 17 | 15 | 14 | 13 | 12 | 11 | |
|---|---|---|---|---|---|---|---|---|---|---|---|
| 31 | 1.15 13.1 km/h 2.42 m | 1.24 14.1 km/h 2.61 m | 1.35 15.3 km/h 2.84 m | 1.48 16.8 km/h 3.11 m | 1.63 18.5 km/h 3.43 m | 1.82 20.7 km/h 3.84 m | 2.07 23.5 km/h 4.35 m | 2.21 25.2 km/h 4.66 m | 2.38 27.1 km/h 5.02 m | 2.58 29.4 km/h 5.44 m | 2.82 32.0 km/h 5.93 m |
| 48 | 1.78 20.2 km/h 3.74 m | 1.92 21.8 km/h 4.04 m | 2.09 23.7 km/h 4.39 m | 2.29 26.0 km/h 4.81 m | 2.53 28.7 km/h 5.32 m | 2.82 32.1 km/h 5.94 m | 3.20 36.4 km/h 6.74 m | 3.43 39.0 km/h 7.22 m | 3.69 42.0 km/h 7.77 m | 4.00 45.5 km/h 8.42 m | 4.36 49.6 km/h 9.19 m |
Scroll to the right to see more gear combinations!
Total Gear Range: 380.1%
Need to calculate the correct Chain length for this gear ratio?
Selected Cassette: 11-27
Selected Chainrings: 31/48
These are affiliate links that help support this site. Thank you for your support!
Related Calculators
Other helpful calculators for Cycling
Cycling Speed Calculator
Calculate your cycling speed based on the distance and time.
Cycling Power to Speed Calculator
Calculate your speed based on power output, temperature, altitude, and other factors.
Cycling Calorie Calculator
Calculate the calories burned during your cycling workout.
Cycling Power Zones Calculator
Calculate your power zones based on your Functional Threshold Power (FTP).
Cycling Watts Per Kilo (w/kg) Calculator
Calculate your watts per Kg based on your Functional Threshold Power (FTP) and weight.