Gearing Comparison

Put two bikes' gears side by side. See which one goes lower for the climbs, and how many of its gears are really any different.

Compare gears
Gearing Comparison: a 2x road bike (16 of 22 gears usable) next to a 1x gravel bike (13 of 13), with each one's chainrings, cassette, wheel and tyre, and a bar for its speed in every gear at 90 rpm. The road bike's six overlapping pairs are numbered.

How it works

  1. Pick what to show. Speed is the one most people want: how fast you'd go in each gear at your cadence. Gear inches and development are the old-school ways of saying how big a gear is. Gain ratio is the only one that counts your crank length.
  2. Set up each bike. One or two chainrings, the cassette (sprocket sizes with commas between them), wheel size and tyre width. Give it a name if you like.
  3. Compare. Both charts use the same scale, so you can see straight away which bike goes lower and which goes higher. Hover over or tap a bar for its gear.
  4. Overlaps. Gears within 5% of each other get the same number in the ≈ column and a paler bar. You'd barely feel the change between them, so we count each set once in "usable gears". A 2x setup always has a few; that's normal.

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