Mountain Bike Gear Inch Calculator
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Gear inches wheel diameter in inches number of teeth in front chainring number of teeth in rear sprocket.
Mountain bike gear inch calculator. Simple just divide your rear cog size from your front chainring size. What gears to choose for my bicycle. Also take a look at our complete bicycle gear ratio chart below to see how your size compares to other gearing options. Originally gear inches represented the diameter of a high wheel bicycle s drive wheel.
When chain drive bikes came on the scene the gear inch calculation was adapted to accommodate. Development the distance in inches your wheel travels for one revolution of the pedals in any particular gear. What combination is best for hilly courses technical courses or flat ones. 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.
80 is green 50ish 80 blue and below 50 red. Old school 3 9 or more and more popular 2 10 or perhaps the newest addition by sram xx1 1 11 or any other options. How to calculate bicycle gear ratio. Colors group similar values.
The ratios are 0 40 for the mountain drive 1 65 for the speed drive and 2 50 for the high speed drive. If you know their numbers just input them below and we ll calculate it automatically for you.