This particular model of JumpKing was made with 2 different size beds. They had 1 with 8.5" springs and 1 with 7" springs. This would mean they took 2 different beds. Both trampolines frames were exactly the same, the only difference was the spring length, which made the mats different sizes. This is why I have listed 2 different spring lengths and 2 different jumping mat sizes. Make sure you buy the correct springs and jumping mat for this trampoline. Measure your springs from hook end to hook end. The trampoline with the 7" springs took the TMRD13'3-96 and the trampoline with the 8.5" springs took the TMRD13-96 spring Mat |