ORIGINAL: rampa203
The pinions I believe have 20 teeth, but they are what comes stock on the 3:1 gearbox. I have two sets of these gearboxes and all have the same pinion gear. The way the gearbox is made I don't think you could use much smaller pinions because you can't move the motors much closer to the rest of the gears.
Ahhh, I see now. I haven't seen the Mato 2.0 gearboxes before.
Keep us informed, this looks awesome so far
Perry