its on there solid,there are two curved brackets that curve around the frame,and the hose clamps are on
to be honost you do not want something thats going to handle a large hit because something has to give,if your bumper doesnt,then your frame will,,its a relitivly inexpensive replacable part that can prevent frame damage
there not designed to be crash proof,there designed to absorb the inpact before something major,and to keep the bike from coming all the way back incase your wheely gets out of hand
if they wanted it to be crash proof,they wouldnt make it out of aluminum