GoPro bike mount (as low as it gets)

thingiverse

This mount is a bit crazy but you will get interesting shots from this camera location. There is one condition, however: your bike has to be equipped with two screws under the bottom tube near the support (2,5-inch distance from each other). There is small support built-in design under the middle plate that overlaps the hole, this one should be removed. No additional support structure required. Remember to protect your lens while using a camera fixed so low, it gets a serious beating from gravel and all other kinds of debris.