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.

Show
Units

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. Pick a gear combo from the list: real chainring and cassette setups, new and old. Or type your own: one or two chainrings (big one first), the cassette (sprocket sizes with commas between them), wheel size and tyre width. Change the gears and the list says Custom.
  3. Compare. Both charts use the same scale, so you can see straight away which bike goes lower and which goes higher, and "How they compare" puts the difference in plain words. 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.
  5. Share it. The page's link holds both bikes' setups. Press "Share this comparison" and send the link to a mate: it opens with the same two bikes.