Originally Posted by
KenV
Look more closely at that video. Those are wing mounted landing gear retracting into the area between the wings. Both the 747 and the A380 have four main gear legs: two mounted on the wings (like the 777) plus two mounted on the fuselage. Those body gear eat into the cargo hold volume. The 777 does not have such body gear which gives it an advantage in hauling belly freight.
I understand what you are saying about body gear. However, the wing gear does not retract into the ctr wing box it is an area behind the ctr wing box fuel tank. It still cuts the size of the cargo hold.