Road Bike Cassette Gear Ratio

Even if you have a bike with a standard front chainset 53 39 and rear cassette of 25 which gives you a lowest gear ratio of 39 25 1 56 you could achieve a similar gear ratio to a bike with a compact chainset 50 34 with a rear cassette of 25 ratio of 1 36 by switching your rear cassette to a 29 tooth lowest gear ratio of 39 29 giving. Wiggle s best selling 10 speed mountain bike cassette is the shimano hg81 slx 10 speed cassette. Colors group similar values.

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In contrast 39 x 25t produces a gear ratio of 1 56.

Road bike cassette gear ratio. We can estimate that froome spent most of his time using a 38x21 gear ratio. Changing the cassette is the easiest way to introduce lower gears to your bike and it s only in recent years that cassettes with a largest sprocket of 30 or 32 tooth have been introduced to. And an 11 28 cassette. With all of the options available to today s road cyclists it is possible to produce gear ratios that are as small as.

3 is green 2 3 blue and below 2 red. When the road starts heading upwards. Meanwhile 11 speed mountain bike cassettes come in even larger sprocket ranges providing an even greater gear ratio choice such as 11 40 10 42 and even 11 46.