Mountain Bike Gear Ratio Table

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.

Mountain bike gear ratio table. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. For a mountain bike off road a top pedaling speed in the low 20s is usually more than enough. 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. Ratio of the lowest gear of your setup.

Colors group similar values. Benefit of 2x10 gearing on long climbs. 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. Shows table of all possible chainring sprocket combinations with gear ratio.

Ratio of the highest gear of your setup. It is now possible to view and collect data on how much time is spent using each gear ratio on the bike and this kind of information will prove invaluable for assessing the utility of specific. A smaller number is easier to accelerate and can still be pushed on steep climbs. 80 is green 50ish 80 blue and below 50 red.

Next look at the top speed available with your largest gear biggest gear inches and decide if this is fast enough. Peter heinle has an excel spreadsheet online with the tooth counts of a large number of 10 through 13 speed cassettes the sram sachs 3 x 7 3 x 8 3 x 9 3 x 10 and the sturmey archer cs rf3 and cs rk3. Simple just divide your rear cog size from your front chainring size. Colors group similar values.

3 is green 2 3 blue and below 2 red. Max speed shown is assuming a cadence of 100. A larger number indicates a large gear that is harder to turn over and is used for higher speed. If you know their numbers just input them below and we ll calculate it automatically for you.

Also take a look at our complete bicycle gear ratio chart below to see how your size compares to other gearing options. How to calculate bicycle gear ratio. The ratios are 0 40 for the mountain drive 1 65 for the speed drive and 2 50 for the high speed drive. Since the amount of oxygen is reduced riders find that an easier gear combination accommodates the ability to produce power for longer periods of time without tiring as quickly.