Mountain Bike Gear Ratio Calculator V 4 0. Ratio of the highest gear of your setup. The gear you're in is a simple ratio of the number of teeth on the chainring to the number of teeth on the sprocket in use.
The gear you're in is a simple ratio of the number of teeth on the chainring to the number of teeth on the sprocket in use. Why Traveling Cyclists Care Gear inches give you a way to compare the distance you travel with one revolution of the crank. It can in fact be said that front chainrings provide a wider gear ratio range, while rear sprockets provide differences in gear ratios of adjacent gears.
I think I only used a real low gear once while riding through a rough hay field with nearly a foot of grass.
Here's a simple way to think about gear-inch combinations: For one revolution of the pedal, your bike will travel a certain number of inches.
Min ratio: Ratio of the lowest gear of your setup. The original calculator page is here. Know that this value does depend on wheel size.