Suggested Gearing 45 inch gear for Advanced Riders Flat
Land Riders - take note of the climbing chart
! Inch-Gear Calculations Explained Here is the way to calculate the in-gear on a bike: Divide the front chain ring teeth
by the rear cog teeth and multiply by the wheel size. Example: 39 front divide by 26 rear x 27 ( road bike ) = 40.5 inch-gear If you multiply the in-gear by the
constant (pie ) 3.1415 , you will get the distance traveled in inches,
with one complete pedal revolution. Example: 40.5 x 3.1415 = 127.23 inches (Bike travels with one complete pedal rev) You can see by this that the smaller the in-gear the more mechanical advantage you have, but the bike speed or movement per pedal revolution drops. Note: The wheel size is not a
consideration when computing the distance traveled with one pedal
revolution. The number 27" for a road bike is
approximate since tire sizes vary and today's bikes use 700 C wheels.
In - Gear x Rev (RPM ) x Pie (3.1415) divide by 12, divide by 88 ( this gets you to MPH) equals speed in Miles per hour. Example going up Mitchell in a 40.5 in-gear at 60 rpm pedal speed: 40.5 x 60 x Pie ( 3.1415) divide by 12, divide by 88 = 7.22 MPH. :-) John
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