What pinion for E-revo/MM/Medusa/TRC lipos??

HI!

I am waitng for me MM ESC and Medusa v2 fterburner 2000kv motor!

I got two TRC 8000mah 7.4v lipos and I will run them in series on my E-revo!

I want about an hour of runtime with these lipos, and speeds around 40mph!

What pinion should I get?
How many tooth?
I am going to get the 5mm bore, mod1 pinion.
Or maybe I will have to get the 5mm bore 32 pitch pinion gears since the E-revo uses 32-pitch gears?
Is so, which pinion should I choose then?


Please help me out here!:)



Thanks!!