Getting a bike stand -- who has one?

[Sky King]

My guess is they didn't tighten it down properly. Or maybe they didn't put it on a joist and it punched through their ceiling? Hard to say, but mine doesn't move around at all. I wouldn't use it if it didn't seem secure. My carbon bike's on the bottom just because I ride it more, DH's heavier (but not super heavy) aluminum road bike goes on top.

It's hard to say, I wouldn't want to make any guarantees and then get proved wrong, but I'm totally confident in mine.

We gave ours rack just like this to our son as he needed a space saver. As a college student living with other college students it has been a great rack, he hasn't had any issues with it falling over. Of course, he doesn't have a carbon fiber bike either he does put his Santa Cruz MTB and his Marin commuter on it though.