HV 4.5 e-revo gearing

[E-Revonut]

I did it, I'm sick of nitro tuning problems so I built a gorillamaxx e-revo. I used the Novak HV4.5 system and I'm looking for suggested gearing and what I should expect for speeds and runtimes. Right now I'm running a 70T spur and 18T pinion, traxxas talon tires and some cheapo 4500mAh 6cell batteries with the new traxxas plugs on everything. I have run a few times with this gearing, pretty impressed with the speed but the torque is amazing! If the tires get traction it will flip over backwards from a roll. My Revo 3.3 has only pulled a few wheelies in it's life and never anything like this! Because of that amazing torque I'm wondering if the gearing is to low. The motor and esc stay pretty cool (next purchase is a temp gun) but I have no problem holding my hand on either. Any suggestions for gearing would be greatly appreciated. I will be upgrading to LiPo's as soon as I sell my T-maxx 2.5R