Originally Posted by
Ironfish653
No real danger in hanging the bikes by their wheels, unless you have very heavy bikes with poor quality wheels.
Taking care when you load and unload will prevent the vast majority of damage from happening to your bikes; my feeling is that a lot of the anecdotes of damage from hanging on hooks is from putting the hook around or against the spokes instead of just the rim, and the tendency to unload the bike by just yanking it down, rather than getting it all the way free of the hanger before lowering it to the ground.
Fancy hangers are nice and all, but you can do just fine with regular hardware hooks if you think about what you're doing and take a little care.
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.
I recognize the black Cannondale 3.0 Crit, somewhere around '89-'92?