Mountain Bike Gear Ratio Chart

Hover over the cells to highlight and see the gearing information. To keep things simple let s look at just 29ers. A sram 10 42 cassette has a very similar gear range but with a 32t chainring the lowest gear has a ratio of 32 42 0 762 and the highest gear has a ratio of 32 10 3 200.

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An intro to bike.

Mountain bike gear ratio chart. Here s a simple way to think about gear inch combinations. Note that a typical 26 fatbike wheel tire is very close to 29 diameter. These gear charts are for comparing gearing with different front chainrings and rear cassettes for 26 27 5 650b and 29 wheels. A smaller number is easier to accelerate and can still be pushed on steep climbs.

A larger number indicates a large gear that is harder to turn over and is used for higher speed. Ratio of the lowest gear of your setup. Complete bicycle gear ratio chart here is a complete bicycle gear ratio chart of the most commonly used bicycle chainring and cog sizes. 3 is green 2 3 blue and below 2 red.

Shows table of all possible chainring sprocket combinations with gear ratio. Use these charts to help decide what size wolf tooth chainring you need. Numbers are gear inches but the actua. If you had to change to 30t chainring on the sram drivetrain you would achieve similar gear ratios as the shimano xt of 30 42 0 714 and 30 10 3 000.

With big hills and fast sprints in races i am not ready to give up ability to climb or sprint for 200 grams i will just eat less. For one revolution of the pedal your bike will travel a certain number of inches. Ratio of the highest gear of your setup. Gear ratio s in the bike gear ratio chart are determined by dividing the number of teeth on the front chainring by the number of teeth on the rear cog.

Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. 40 10 30 7 gain one gear for top end from 11 to 10 you lose about 200 grams of weight and simplify the bike but the chains rings and cassettes wear way faster ask any bike shop and cost more. Know that this value does depend on wheel size. Colors group similar values.

Using a gear inch chart is one way to compare gear ratios without riding the bike.