It is really simple. I made sure I mounted the shelf in studs in the wall or used good wall anchors. The bike is about 40 lbs. As you can see I have it lean over to clear the bars, and pushed the tires aginst the wall.
It is held by a bungee I bought at home depot, and cut it down to a short length. You have to cut it pretty short cause it will stretch a bit. I just hooked one side of the bungee to the frame and the other side I made sure I found a stud in the wall and used drywall screws. It is really quite stable, I was surprised when it was done. And 40 lbs is nothing for a bungee to hold. I think it looks better then a lot of other wall mounts that are out there.