Understanding Road Bike Gear Ratios

With all of the options available to today s road cyclists it is possible to produce gear ratios that are as small as 1 0 and as large as 5 0 with increments of 0 15 0 40. Accuracy to a single inch is all that s needed so they re rounded. To calculate a gear in inches you multiply the raw gear ratio by the wheel diameter.

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Beyond The Big Ring Understanding Gear Ratios And Why They Matter

Our complete guide to bike gears takes the mystery out and will have you joining in with all the other bores banging on about ratios in no time at all.

Understanding road bike gear ratios. Colors group similar values. The gear ratios you want to use for a hilly cycling holiday in mallorca are not the same as the gears you want for a time trial criterium club ride or city riding. Gear ratios can make or break your ride so choosing the right ones for you is vital to getting the most out of cycling menu expert road bike reviews and the latest road bike news features and. In keeping with tradition the nominal wheel diameter used for road bike gear inches calculations is 27in.

3 is green 2 3 blue and below 2 red. That gives you the size of a high wheeler with the same gear. A bike with 30 or more gears is not an indication of a machine designed to break the land speed record any more than a bike with only a single gear assuming similar ratios.