Speed / Cadence Calculator

Enter your target speed and cadence to find matching gear combinations.
Enter your desired speed in kilometers per hour (10-60 km/h).
Enter your desired pedaling rate in revolutions per minute (40-150 rpm).
Calculation Summary
Target Speed (km/h)
30 km/h
Cadence (rpm)
90 rpm
Required Rollout
5.556 m

Recommended Gears

FrontRearRollout(m)Diff(m)Speed @ Cadence (km/h)
47T18T5.5617 m-61.11 cm30.0 km/h
34T13T5.5708 m-152.13 cm30.1 km/h
39T15T5.5380 m175.56 cm29.9 km/h
52T20T5.5380 m175.56 cm29.9 km/h
42T16T5.5912 m-356.94 cm30.2 km/h
44T17T5.5129 m426.15 cm29.8 km/h
50T19T5.6053 m-497.07 cm30.3 km/h
31T12T5.5025 m530.56 cm29.7 km/h
49T19T5.4932 m623.98 cm29.7 km/h
36T14T5.4771 m784.13 cm29.6 km/h
41T16T5.4581 m974.31 cm29.5 km/h
46T18T5.4433 m1122.23 cm29.4 km/h
51T20T5.4315 m1240.56 cm29.3 km/h
33T13T5.4069 m1486.33 cm29.2 km/h
38T15T5.3960 m1595.56 cm29.1 km/h
43T17T5.3876 m1679.09 cm29.1 km/h
48T19T5.3811 m1745.03 cm29.1 km/h
53T21T5.3757 m1798.42 cm29.0 km/h
30T12T5.3250 m2305.56 cm28.8 km/h
35T14T5.3250 m2305.56 cm28.8 km/h