so my cyclometer says to take the Milimeter measuresments of my tire and multiply them by 3.14 to get the code to put into the computer.
so, my tire says 23x622 on it, so at first I assumed that meant 23" 622MM... but 23" is actually 584.2 MM...
so which one do I put in? when I measure the inside of the wheel, from metal to metal is exactly 23"s, but when I put 584.2•π code into my computer, and measure it with a car, it is about 2 MPH off (my bike says 10mph, the car says 12.
so I'm guessing the 622 is from edge of wheel, to edge of wheel, is that the code I am supposed to put in to make it accurate?