The maximum gear ratio.....

[charliebrown]

Ok the maximum gear ratio (if you used the pinion, idler, and spur gears) would be 2:1. Now, if you count the number of teeth between the spur and idler gear, there is:

12:1.....24 spur teeth and 6 idler teeth
9.86:1....23 and 7
8.25:1......22 and 8
7:1.........21 and 9
6:1.........20 and 10
5.18:1......19 and 11
4.5:1......18 and 12
3.93:1......17 and 13
3.43:1........16 and 14 (This is not the KIT RACER gears, it is if you had ZZ gears with the amount of teeth)
3:1............15 and 15 (half and half, lol)
2.625:1.......14 and 16
2.3:1...........13 and 17
2:1.......12 and 18


Here is how to find out what gear ratio you have:

For ZZ and MS gears, the pinion gear has to turn 3 times to turn the idler gear once, because the pinion has 6 teeth and the idler has 18 teeth that touch the pinion gear.

Now, take the idler gear's teeth (inner teeth, in the center) and the spur teeth and divide the number of spur teeth by the idler teeth and multiply that number by three to find out your gear ratio. That's it!