Gear ratios
Enter your chainrings and cassette. The chart shows every gear you actually have, which ones duplicate each other, and where the chain runs at an angle worth avoiding.
Drivetrain
Tooth counts, separated by commas. A 1x setup is a single number.
Every cog, separated by commas. Order does not matter.
Common setups
Wheel and cranks
622 for 700C and 29 inch, 584 for 650B and 27.5 inch, 559 for 26 inch.
Used for the speed column. 90 rpm is a common seated cadence.
Gear chart
The diameter of the wheel that would give this gear if you pedalled it directly. Big numbers are hard gears.
Each row is a chainring. Marked gears are cross-chained — usable, but the chain runs at a harsh angle.