Trampoline springs can be lost or stretched by misuse, i.e. exceeding sensible weight limits. You should replace them with quality OEM fully galvanized springs for strength and long life.

Helpful hints:

• Replace trampoline springs if the coil does not return to its normal shape when removed from the frame.
• Replace trampoline springs if the spring's hook is deformed.
• If adult jumpers bottom out or nearly bottom out when bouncing this indicates many trampoline springs need replacing.
• To test all trampoline springs, clench the end of the coil in your fist and shake it. After shaking several trampoline springs you will notice a variance in the amount of coil tension. Replace those trampoline springs that are noticeably loose.

Failing to replace defective trampoline springs make spring failure contagious as neighboring trampoline springs are forced to carry increased load.