Originally Posted by mixtli

I purchased 3 tiger 1/16 level 4 from Torro and have been reading about the Waltersons upgrades (motors and gearboxes) but I can't understand what the difference is in 1:3 vs. 1:4 or 5... can anyone explain as if I was a 4th grader!? Does anyone recommend the upgrade? I'd like it to be fast but don't want to loose too much torque. Other upgrade recommendations?
Thanks