-
If you imagine a cassette lying flat on a table, so that it looks like a very small and pointy metallic hillock, the easiest, spinniest 'bottom gear' is the biggest/widest diameter sprocket at the base of this mini-mountain, before working your way up to the hardest, grindingest 'top gear' at the smallest sprocket. Not sure if that's useful or not but I've seen people go 'oh yeah!' when explained like that before...
Surely the opposite be of Top Gear? Bottom? First? Lowest? Big sprocket?