Got the pede 4x4 kit today and out it together. I'm ran it on a 5000MaH 2s pack and I'm only getting 19 mph. I know the'y're not speed demons on 2s, but I'm running a 11/54 gearing the same as my rustler (pulled the vilineon motor and esc from it) and the 2.8 jconsepts tires on it that i used on my rustler and its just so much slower. Any ideas of what would cause the speed decrease?