Originally Posted by
Duragrouch
Hanging bikes from vertical hooks, is not the same as using hooks from the side as pictured, which can increase hook and rim loading, in the same way that levering a nail out with a hammer claw, can exert far more pulling force than hooking with the claw and then pulling straight up; The latter will never pull the nail.
Except hanging the bike isn't exerting any "extra" force. Just like simply hanging a hammer on a nail by the claw isn't going to pull the nail without the "extra" force added by your arm. .