Online cycling tools
Gear ratio calculator.
See how chainring, cassette, cadence, and tyre size change speed, rollout, and climbing feel before buying drivetrain parts.
Drivetrain
Preset
Mechanics
Gear inputs
50 T
T
17 T
T
90 rpm
rpm
Cadence table
70 rpm26.4 kmh
80 rpm30.2 kmh
90 rpm33.9 kmh
100 rpm37.7 kmh
110 rpm41.5 kmh
Terrain read
Fast2.45+
Fast
Rolling
Climb
Wall
How to use this
Use rollout to compare gearing across different wheel and tyre sizes.
Check speed at cadence before buying a chainring or cassette.
For climbing, keep cadence realistic. A lower gear is faster than grinding.
Next step
Use the table before swapping drivetrain parts.
A larger chainring, wider cassette, or different tyre size can all change the same ride. Compare the tradeoff before ordering.
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