As others have said don't even bother with the included screws. If you try to screw them into something stronger than foam nothing will work. Heads just fall off. Upgrade to regular screws and you will be golden. We have four of these in our shed where we expose the rivets and they work great. We have two standard size mountain bikes, one youth size mountain bike and one large 27.5 inch mountain bike. They can easily be hung on hooks, but I wouldn't recommend 4 such wheels in a row. in the middle it will be almost impossible to get out. Instead I have two on one side, a missing bobby pin in the middle where I hang 4 helmets vertically, and then two on the other side. Works great and the bikes are cheaper. Great product for the price but you should just throw those screws away, they are absolutely useless and a waste of the $0.05 you must have paid for them.
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