Gearing/Battery choices; gear up or increase voltage

[lincpimp]

I would go with 3s on the sidewinder sc system. The sc10 is 2wd, correct? If so it should be similar weight to my pede 2wd, and I run 3s with the sidewinder sc. I am geared for about 45mph and nothing even gets warm. The esc is anout 80f and the motor is no higher after 30mins. This is a great 3s setup for a 2wd 10th scale and would be killer in a 10th 4wd tc. Way to go castle!!!

As for the other truck, I am sure 3s and higher gearing will be fine. I ran mine with a 1509 neu on 2s lipo with a MM. Not sure on gearing but it was a 6500kv motor and I geared for mind 40s. You really want to keep the weight down in the ste, it is not a really heavy duty truck, and the suspension works better if it is keep light weight. A 3s 5000mah pack should be just fine.