Originally Posted by iamlucky13
I'm not familiar with the term gear-inch. Can you explain that briefly?
Gear Inch is the OLD way of specifying gear ratio's and it makes sense to me because I'm OLD.
From the day's of 27" wheels its a simple calculation of front chainring (42t) divided by rear sprocket (13t) x wheel diameter (27") = 87 gear inches.
Its not realy suitable for accurate calculations but its a method suitable for considering one gear ratio in relation to another thats easy to calculate.
Regards, Anthony