Mountain Bicycle Gear Ratios

1 means that the gear multiplies every turn of your pedal to make the wheel of your bike rotate at approximately four times.

Mountain bicycle gear ratios. Today s road cyclists are equipped with more gear ratios than ever and thanks to the growing size of sprockets and shrinking chainrings those ratios have been getting smaller too. Whereas you ll see bikes with two front chainrings abbreviated to 2x. 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. Bicycles usually have from one to three front chainrings with relatively large gap of teeth number between them.

In order to run that ring you are going to need a direct mount crankset. 3 is green 2 3 blue and below 2 red. The most common gear configurations for modern mountain bikes include one or two front chainrings. Typical mtb cranks with three chainrins of 44 32 and 22 teeth.

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. You can see the climbing gear ratios are close between the two systems. Benefit of 2x10 gearing on long climbs. 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.

A larger gear is hard to push but provides you with greater distance for every rotation of your pedal. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm. If you re concerned with optimizing performance and don t want to give up gears on the climbs or descents then 2x10 is likely the better choice for you. Tight gear spacing lots of gears with 10 to 15 of gear ratio difference so that appropriate gear can be selected depending on riding conditions.

Shows table of all possible chainring sprocket combinations with gear ratio. In order to achieve a seamless transition in your climbing gears a 28t ring would get you there. Bikes with single front chainrings are referred to as 1x or one by. Ratio of the lowest gear of your setup.

Many cyclists want lower granny gears for long climbs particularly when training and racing at altitude. Ratio of the highest gear of your setup.