Originally Posted by BrianG

It sounds like you want a really low geared maxx. You could keep the two speed tranny and run something more like 51T/14T or 15T. That would give you low end torque in first gear and high speed in second. If you have the tranny locked into second, then you don't have as many options. Although, honestly, first gear is useless with BL power.

Also, I'd personally go with a little higher voltage, like 4s, and the 9 or 10XL. That way the batts are balanced 2s on each side. The 9XL will still have more power than the titans and runtime will be better. The 10XL will have even better runtime, but be slower.