Let's Make Robots!

minimum torque for 20 kg robot (53pound)

I'm wondering if the tracked robot I'm building will have enough torque...
It weighs 20kg( really max)
wheels radius (wheels and tracks) 4.5cm  1.8in
I have 2 motors giving 2000 rpm, 0.2n.M 28.3in-ozf
I wanted to use a 1:1 ratio for doing speed, and a 2:1 for climbing. max speed at 1:1 about 20kmh, 12mph.

tracked robot pulling a caravan

quite heavy high toque little robot with rubber tracks, pulling a caravan.