Cycling Speed Calculator
Calculate your cycling speed, time, or distance based on the other two variables.
CyclingDetermine the Gear Ratio for Your Gravel Bike Based on Tire Size, Chainring, and Sprocket
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.
mm
RPM
°
31
48
11
12
13
14
15
17
19
21
23
25
27
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
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