Without counterweight my SA barely could lift smallest box (its EU "standard" container - 0,8 X 1,2 X 0,75 m) full with dry firewood. Driving with such box on forks was very unpleasant
With 200 kg on it's tail my little tractor can lift even 0,8 X 1,2 X 1 m big crate full with with fresh firewood