Originally Posted by FixednotBroken
whoops - i seem to have indulged in some 'fuzzy' math. this should set the record straight:
one mile = 63,360 inches
108 miles = 6,842,880 inches
divide 6,842,880 by 73.6 (gear inches), and you get roughly 92,974.
feel free to correct if i've screwed it up again...
btw, i was on the yellow fixie with bullhorns and a brake - did i see any of you?
Oooops. gear inches is not the distance traveled in one pedal rotation. It's the equivalent wheel diameter of a penny farthing (high-wheeler). You want to multiply gear-inches * pi to get development. That is the distance traveled in one pedal rotation. So:
73.6 * 3.14159 = 231.221 inches development
6,842,880 / 231.221 = 29594.544 pedal rotations
EDIT: cicadashell beat me to it .... so: what he said.