what is going on with my MMM V3?

[lincpimp]

The HPI gearing charts are not recommended gearing charts, just info to show what the gearing will do. If you want to reach the 62mph speeds with 6s you have to change to the phatlines and use the 25t pinion. If you plan to keep the stock tires I doubt the will be controllable over much more than 50mph. A 15-16t pinion will produce the same speed on 6s as the 20t pinion does on 4s. I think a 17t pinion would be about right for 6s and the stock tires.

I will add that i am kinda sick of the whole 4s - 6s crap. Just pick a voltage and stick with it. So many people who have little to no brushless experience are buying these vehicles and want to run both voltages with no gearing change. Just not a good idea, but it is hard to talk sense to some people...