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Mtb Bikes Bicycle Hybrid RSS quote-openA short look at how the gears on a mountain bicycle work. Read on to learn how you can use them to better enhance your cycling experience. Mountain bicycle gears are fetching more and more sophisticated. Today its not useless of for a bicycle to have 27 gear ratios. Mountain bikes use a combination of nine different sized sprockets in the back and three in the front to make gear ratios. The idea behind it is to permit the cyclist to oddball the wheel at a steady speed regardless of the land the bicycle is on. Its easier to understand this by imagining the bicycle with only one gear. On your rotating the wheel once, the rear helm undergoes one rotation too. If the back helm has a 26 creep diameter and the gearing ratio is 1:1, twisting the wheel one filled time would effect in the helm cover 81.break6 inches of ground. If you are pedaling at 50 RPM, this means the bicycle...quote-close