The base of the rack
The base of the rack is stable and well balanced. However the top bar with the hooks which hold the bikes is quite flimsy. With two adult bikes and two kids’ bikes loaded, the top section is already bending, and the hooks themselves are bending as well.
It feels like the top part of the frame is under-designed relative to the rest, which is a shame because the lower structure is solid. While I don’t think the bikes will fall, the twisting and flex doesn’t inspire confidence. I’m already considering ways to reinforce it, which shouldn’t be required