mmmmmm - your "granny gear" is going to mean something different to different people... for some it may just be the smallest on whatever crankset they use. Most people use it to refer to the easiest gears on a triple. For others still (especially those who intend to carry heavy loads up steep hills), they may modify a road bike with a long cage front derailleur to allow a smaller front ring and a mt bike cassette on the back to get their "granny gears".
Pretty much the term just kind of grew out of referring to a gear small enough that your granny wouldn't find it difficult.... its not really a specific gear ratio....



Reply With Quote