Mountain Bike Gearing Chart

For one revolution of the pedal your bike will travel a certain number of inches.

Mountain bike gearing chart. More than ever people ask nowadays. Colors group similar values. A bike with 30 or more gears is not an indication of a machine designed to break the land speed record any more than a bike with only a single gear assuming similar ratios. Here s a simple way to think about gear inch combinations.

Hover over the cells to highlight and see the gearing information. 3 is green 2 3 blue and below 2 red. I ll calculate the best chainring cog combinations and skid patches for your speed and cadence and what your speed will be at various cadences. What combination is best for hilly courses technical courses or flat ones.

The distance covered in the lowest gear with a 34t chainring and a sram eagle drivetrain on a 29er is about 1 57 m per crank rotation and on a 27 5 bike with a 36t chainring one crank rotation gets you 1 58 m. Old school 3 9 or more and more popular 2 10 or perhaps the newest addition by sram xx1 1 11 or any other options. Know that this value does depend on wheel size. This way you ll be able to make informed decisions when upgrading cassettes or buying new bikes in the future.

80 is green 50ish 80 blue and below 50 red. To keep things simple let s look at just 29ers. The gears on a mountain bike. What gears to choose for my bicycle.

Enter your own info above and then press the button. Using a gear inch chart is one way to compare gear ratios without riding the bike. The ratios are 0 40 for the mountain drive 1 65 for the speed drive and 2 50 for the high speed drive. How mountain bike gears work.

The bigger the gear range of the cassette with the same amount of gears the bigger the steps between gears. Colors group similar values. Even toothed gears only. Before going any further it makes a lot of sense to get a really good understanding of how the gears on your mountain bike actually work.

An intro to bike.