I'm in the process of writing an online speed calculator given gearing and cadence values. I know there are several out there but I was doing it for my own website and to practice my web scripting skills.
I was looking at Sheldon Brown's bicylce gear calculator Sheldon Brown's Bicycle Gear Calculator and saw that his values change depending on crank length. I don't understand how crank length affects cadence or speed - surely one revolution is one revolution whether the crank is 1cm or 100cm? Anyone more mathematically/scientifically minded like to enlighten me?
I was looking at Sheldon Brown's bicylce gear calculator Sheldon Brown's Bicycle Gear Calculator and saw that his values change depending on crank length. I don't understand how crank length affects cadence or speed - surely one revolution is one revolution whether the crank is 1cm or 100cm? Anyone more mathematically/scientifically minded like to enlighten me?