Thanks guys....

I'm not going to buy any new batteries until i get the truck all put together and see how much room i have to work with....

I did check out that speed calculator and it a very cool tool......

It says my motor speed will be 36318.8 RPM....and top speed will be 34.98 MPH (56.19km/h).....i think i used it right?

I just automatically gear low for my track as it has a history of letting the smoke out of ESC's and several motors!

Thanks heaps for the warm welcome and use full input!