To find a suitable trampoline replacement spring, first remove 1 intact spring from the trampoline frame to measure. To pick up a tape measure, you need to measure the total length (Total Length) from the top of one hook to the top of another, and never measure only the spiral coil part in the middle. If this removed slack spring is measured to be just 5.5 inches, 7 inches or 8.5 inches, this is the exact specification you need to place an order. However, if the number you measure is stuck between the standard sizes (e.g. 6.9 inches), in order to ensure the tension and safety of subsequent installation, remember to always calculate the size larger and take the nearest standard integer (I .e. 7 inches).

Removing The Spring Is Crucial For Accuracy

When looking for a replacement spring, the most common mistake I ‘ve seen is in the initial measurement phase. Many owners try to save trouble and try to measure directly while the spring is still hanging on the jumping mattress and frame. You should know that the spring installed on the trampoline is always under great tension. This static tension will stretch the spring far beyond its length at rest. If you measure 1 springs that are still attached to the shelf, you get a reading of “stretched length” rather than “actual length”. According to this data to buy accessories, finally get the spring must be too long, can’t use. Therefore, the spring must be completely removed from the frame, let it return to its natural, relaxed neutral state, and then put on the tape measure.

Identifying An Undamaged Spring

The accuracy of your order depends to a large extent on which sample you choose to measure. Trampoline springs will appear “permanent deformation” over time-this is the 1 state in which the coil cannot rebound to its original shape after being overstretched. When the spring is in a relaxed state, if you look at the obvious elongated, or there is a gap between the coils visible to the naked eye, never take this as a sample. These gaps indicate that the metal is fatigued and is now longer than it was when it left the factory. In order to get the correct replacement size, you have to find a spring on the trampoline with 1 closed coils and no gaps. If you are unlucky and find that all the springs look loose, pick the smallest gap, but have a number in mind: the standard size of the original factory is likely to be slightly shorter than your current measurement.

How To Measure

When measuring with a tape measure, the hand should be steady and the accuracy should be high. It is often not clear whether the spiral part (coil) or the whole root is measured. In the industry of ordering accessories, manufacturers are classified by “total length. You must align the “0” scale end of the tape measure with the tip of one hook and measure all the way to the tip of the opposite hook. Don’t measure to the end of the coil and stop. The distance of “hook to hook” is our common language when choosing trampoline parts.

Navigating Standard Sizes And When To Round Up

The trampoline replacement spring market on the market typically revolves around a particular standard integer or half-integer size, such as 5.5 inches, 7 inches, or 8.5 inches. Ideally, the intact spring you remove should accurately correspond to these numbers. However, due to small tolerances in the production process or slight wear and tear, you may get a less “full” reading, such as 6.9 inches. In this case, the line rule is “round up”. A 6.9-inch reading, in fact, is almost certainly the 1 7-inch spring, with only slight contraction or within error. If you’re smart enough to round it down (like thinking it’s 6.5 inches), the replacement is too short. It takes a lot of force to hard-fit 1 springs that are too short, which will not only damage the new springs instantly, but may even deform the trampoline frame. Listen to me, carry to the nearest standard size (for example, choose 7 inches), so as to ensure that the spring provides the correct tension, so that the jumping surface is safe and elastic.

Author ：Damon

I am a trampoline safety and maintenance specialist. With years of hands-on experience in equipment assembly, I help owners identify the exact parts they need. I hope to ensure you measure correctly—from hook to hook—so your replacement springs provide the safest and best possible bounce.