gearcalculator
Gear Calculator
BMX Gear Calculator Online

Please enter the following information:

Front Gear
Freewheel
Choose your wheel size

 

The rollout is:

If you used a front gear,

the rollout would be .

If you used a front gear,

the rollout would be .

If you used a freewheel,

the rollout would be .

If you used a freewheel,

the rollout would be .
1
Contact
*   Most Pro BMX'rs Run Approximately 54 gear inches
*   44/16 gear ratio with 20x1.75 tire is the most commonly used combination in BMX
*   For Exact Gear Measurement... Divide Front Gear by Rear Gear and Multiply by Tire Diameter
*   Example: 44/16 = 2.75 x 19.5 = 53.625 gear inches (20x1.75 tire)