Bicycle Gear Ratio Calculator
Bicycle Gear Ratio
Calculate gear ratios, development, and speed for any chainring and cassette combination.
Formula
Gear Ratio = Chainring Teeth / Cog Teeth; Development = Ratio x Wheel Circumference
Frequently Asked Questions
What is a good gear ratio for cycling?
It depends on terrain. A ratio of 2.5 to 3.0 is common for flat riding, while 1.0 to 1.5 is typical for climbing steep hills.
What are gear inches?
Gear inches represent the effective diameter of the wheel as if it were a penny-farthing. Higher gear inches mean a harder gear.
What cadence should I ride at?
Most efficient cycling occurs between 80 and 100 RPM. Beginners often pedal at 60 to 80 RPM.
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