Just wanted to add this, thread i created a while ago with actual gear ratios for a couple different boxes: http://www.rcuniverse.com/forum/rc-t...gearboxes.html

I found the euro-spec "dual ratio" gearboxes to provide no benefit over standard "3 shaft" boxes. Small motors with barely increased gear ratio. Really dissappointing. In my experience so far the 4 shaft boxes are the only of the standard gearboxes that are worth putting in any tank. The problem is the models they dont fit in...