How many gear sets are there?

I just got my racer gears! The little Anime Shop shipped late, but they threw in this S-03 setting parts set, so that's okay (even though it's completely useless for a bit). The first thing I did (of course) was count all the little bumps on the gears, and I realized there's something missing! This is what I mean:

24 / 6 * 18 / 10 = 7.2 Cannonball
24 / 6 * 18 / 6 = 12 Sky Blue
23 / 7 * 18 / 6 = 9.86 Orange
22 / 8 * 18 / 6 = 8.25 Teal
21 / 9
20 / 10 * 16 / 7 = 4.57 Blue
19 / 11 * 16 / 7 = 3.95 Red
18 / 12 * 16 / 7 = 3.43 Green

Tiny has an icon for 6.57, and I've also heard there's a 6:1 gear set. Does anybody have these?

Edit: Added more gear sets!