Gearing Explained
Gear Ratio Lingo:
Gear Ratio impacts how far the bike travels for each rotation of the crank. A “high” gear travels farther each pedal stroke than does a “low” gear. And of course, the farther you push the bike each pedal stroke, the more force and energy it takes to turn the crank.
Most humanoids pedal most efficiently at around 80 – 100 rotations per minute. Multi-speed bicycle drivetrains allow riders to pedal in that sweet spot over a variety of speeds and terrain and with varying effort.
There are several terms to describe the gear ratio of different chainring and cog combinations.