IMO, hanging a bike was probably gutsy... I wouldn't want to trust the strength of the layer laminations. How much weight were you putting on each hook?

You might show a picture of the hook that shows how it failed. The picture should also help us understand how the part was oriented when it was printed. Provide more information like what you are used for a slicer and the settings you used to prepare the print. Settings like temperature, perimeter info, infill type and infill percentage are examples of what people are going to be looking for.