Cheap hoops are not built to withstand dunking or hanging on the rim. Dunking requires more stability, so more weight, meaning more expensive, heavier materials are used. So to dunk on any system, it's not going to be cheap! For dunking in backyard basketball, unless you have space and resources for a giant portable tournament hoop, a heavy weight in-ground system is the way to go. Check out the installation guide for a Mega Slam Hoop to see what's required to install a dunk-proof system. Tip: All Mega Slam basketball hoops are dunk-proof with 180° directional flex rim upgrade as standard from OnCourt.