Bicycle Gearing Inches
Calculate Bicycle Gearing Inches instantly with the exact formula and a worked example.
Bicycle Gearing Inches
Chainring teeth
Rear cog teeth
Rim bead seat diameter (BSD)mm
Tire widthmm
Crank lengthmm
Gear inches
88.189
Distance per pedal revolution
7.04m
Gear ratio
3.333
Gain ratio
6.49
More about: Bicycle Gearing Inches
What it calculates
The “Bicycle Gearing Inches” calculator computes Gear inches from 5 parameters: chainring teeth, rear cog teeth, rim bead seat diameter (bsd) (mm), tire width (mm), crank length (mm).
A study aid and exam-prep helper.
Example calculation
With parameters Chainring teeth = 50, Rear cog teeth = 15, Rim bead seat diameter (BSD) = 622 mm, Tire width = 25 mm, Crank length = 172.5 mm the result is 88.19.
How to use
- Enter chainring teeth, rear cog teeth, rim bead seat diameter (bsd), tire width and crank length — each field above is adjustable with a slider.
- Gear inches is calculated automatically as you type.
- Check the worked example below to see the formula applied to real numbers.
- Copy the result or bookmark this calculator.
Related calculators
FAQ
How is Bicycle Gearing Inches calculated?
The Bicycle Gearing Inches calculator computes Gear inches from chainring teeth, rear cog teeth, rim bead seat diameter (bsd), tire width, crank length. Enter your values above and the exact formula is applied instantly; a worked example with real numbers is shown below.
Is the Bicycle Gearing Inches calculator free?
Yes. It is completely free, needs no signup, runs entirely in your browser, and sends no data to any server.
More calculators in this category
Explore related free tools