Mountain Bike Gear Ratios Explained

But to view these as 21 independent gears numbered 1 to 21 would be wrong. To understand why we first need to understand gear ratios. An intro to bike.

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Mountain bike gear ratios explained. Having the right gear ratios on your bike will make a huge difference to your riding experience. A comfortable pedal power on a 26 wheeled bike will feel considerably easier than the same gear ratio on a 29er. 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. Allows you to add custom cassettes and chainrings.

The address of the webpage always reflects selected setups. Gear ratios explained for triathlon. Using a gear inch chart is one way to compare gear ratios without riding the bike. Calculates gear ratio of your setup and converts it to 26inch wheel setup can be turned off in options to be able to compare gear ratios among different wheel sizes.

Mountain bike drivetrain components explained. For one revolution of the pedal your bike will travel a certain number of inches. If our bike has three chainrings and seven sprockets we have 3 x 7 21 gear ratios. If you re a downhill mosher with a big rig bike then it s unlikely you ll be doing any real climbing.

This is what is referred to as 21 speed. 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. 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. To keep things simple let s look at just 29ers.

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. This video simplifies all the terms and explains how your gears impact your riding. Here s a simple way to think about gear inch combinations. Cycling gearing can be confusing.

A typical gear system may have three chainrings in a 44 32 22 format and eight or nine sprockets on the cassette usually 11 32. Riding style plays an important part in setting up your gear range. Know that this value does depend on wheel size. 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.