This chart is designed to calculate and compare the gearing range of two different bike drivetrains of your choosing.
Gear inches is a relative measure of the mechanical advantage of your bike drivetrain. In other words, the lower the gear inches, the easier it is to go uphill and the higher the gear inches, the faster you can smash. With 1x drivetrains becoming competitive with multi-chainring setups, this utility will let you assess the total range and evenness of steps in the rear cassette.
Don’t see the bike you’re interested in here? The bike geometry database is currently open for anyone to contribute to. It just takes a few minutes of your time and any additions will be included in the next day’s chart refresh. Try it!