Mountain Bike Gear Ratio

For one revolution of the pedal your bike will travel a certain number of inches. Ratio of the highest gear of your setup. 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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With 26 inch wheels the bike moves forward 326 inches with each pedal stroke.

Mountain bike gear ratio. The gear you re in is a simple ratio of the number of teeth on the chainring to the number of teeth on the sprocket in use. 26 mountain bike wheel will travel smaller distance for one turn compared to a 28 road bike wheel. Now for exact gearing the wheel diameter needs to be taken into consideration. I ve been a mediocre mountain biker for 20 years.

So with the same chainrings ratio gearing on a road bike will be higher than on a mtb. In a fixed gear or single speed bike having the right gear ratio according to your needs and cycling habits is very important since you can t change your gears while riding. The most common gear ratios in fixies are 44 16 and 46 16. Even the wheel size of your bike will affect your gear set up.

The highest gear ratio on the bike might be a front chain wheel with 44 teeth and a rear gear having 11 teeth. Here s a simple way to think about gear inch combinations. My main passion on a bike is long steep low gear grinding hills think of grinding up the face of aspen mountain on summer road. An intro to bike.

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. I am 53 now so i m old and set in my ways. Ratio of the lowest gear of your setup. A comfortable pedal power on a 26 wheeled bike will feel considerably easier than the same gear ratio on a 29er.

That creates a 4 to 1 gear ratio. At a 60 rpm pedaling rate the speed of the bike is 18 5 mph 30 kph. Know that this value does depend on wheel size. 44 16 produces higher acceleration but you get lower potential top speeds.

Using a gear inch chart is one way to compare gear ratios without riding the bike. Shows table of all possible chainring sprocket combinations with gear ratio. To keep things simple let s look at just 29ers. Moving your mouse over the ratio will show speed you will achieve by pedaling at 100 rpm.

So in the example above with a 2 1 gear ratio one full rotation of the pedals will result in 2 full revolutions of the wheels. That being said my granny gear ratio is really important to my getting into a groove or trance while climbing. 3 is green 2 3 blue and below 2 red. Colors group similar values.

For example with a 32 tooth ring and 16 tooth cog your ratio is 2 1.