Mountain Bike Gear Ratio Calculator

Colors group similar values.

Mountain bike gear ratio calculator. If you re using a schlumpf drive plus an internal gear rear hub you should enter the actual number of teeth of the front chainring for the first chainring and this number of teeth times the schlumpf ratio for the second chainring. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. Enduro s editorial team had an internal and we found a clear favourite. Here is a complete bicycle gear ratio chart of the most commonly used bicycle chainring and cog sizes.

For a mountain bike off road a top pedaling speed in the low 20s is usually more than enough. The ratios are 0 40 for the mountain drive 1 65 for the speed drive and 2 50 for the high speed drive. Once you ve understood the basic gear ratio calculations though you ll be able to work out which chainring size best suits your kind of riding. Your cranking along with your 2 10 front chain ring 38 big ring rear cog 21 6th gear yielding a ratio 1 81.

Ratio of the highest gear of your setup. Shows table of all possible chainring sprocket combinations with gear ratio. Max speed shown is assuming a cadence of 100. Next look at the top speed available with your largest gear biggest gear inches and decide if this is fast enough.

Colors group similar values. You come around a turn their in front of you is a steep windy climb replete with bare slippery tree roots. Ratio of the lowest gear of your setup. Hover over the cells to highlight and see the gearing information.

80 is green 50ish 80 blue and below 50 red. This is comparable to your 1 10 front 30 rear cog 16 4th gear ratio 1 875.