´cause the Antonov has its center of lift directly above the landing gear. Thus provides smaller loads on the aft wheels whilst landing.
The center of lift of the hyperjumbo
IS directly above the landing gear (resultant center of lift of both wings).
Just to clarify, the projected CG and center of lift characteristics of this aircraft is similar to that of an aft-mounted engine aircraft like the MD-80 because it's 6 engines are practically mounted aft. This is why the landing gears are moved back.
Also, I've modified the landing gear a bit. It now features 2 rows of wheels in each bogie compared to just one in the previous photos.