6 Best Trailer Door Struts For Effortless Opening

Dragging a heavy, mud-caked ramp down after a long day of moving livestock or hauling feed is the kind of back-breaking chore that takes the joy out of hobby farming. Properly fitted gas struts turn that cumbersome door into a feather-light mechanism, saving energy and preventing accidents during routine tasks. Investing in a quality lifting system is a small equipment upgrade that yields massive dividends in daily operational efficiency.

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Tuff Support 6133 Lift Support: Best Overall

When consistency is the priority, the Tuff Support 6133 stands out as the standard for utility trailers. These struts provide a predictable, smooth extension that prevents the door from slamming down or jerking during the lift cycle.

Engineered to handle the vibration of gravel roads and the weight of standard cargo, they rarely fail under normal farm conditions. This model offers the most reliable balance between force output and durability for the average utility trailer.

If the goal is a “set it and forget it” replacement that just works, this is the definitive choice. It provides enough resistance to keep a ramp steady, yet allows for effortless manual operation.

StrongArm 6103 Gas Spring: For Heavy Ramps

Hobby farmers hauling specialized equipment or heavy livestock mats require more than a standard strut. The StrongArm 6103 is built with reinforced seals designed to support significant dead weight without sagging over time.

These springs excel on trailers with custom-built, heavy-duty wooden or steel mesh ramps that exert high pressure on the pivot points. Because they are designed for higher load capacities, they prevent the dreaded “ramp-drop” that often leads to pinched fingers or damaged trailer frames.

If the trailer ramp is noticeably difficult to lift, or requires two people to operate, the StrongArm 6103 is the upgrade needed to make it a one-person job. These are specialized tools meant for high-load applications.

Apexstone 100 Lbs Gas Struts: Top Budget Pick

Budget constraints are a reality on every farm, but that does not mean settling for inferior hardware. The Apexstone 100 Lbs struts offer a surprisingly high build quality at a price point that makes it easy to replace all struts on a fleet of utility trailers at once.

These are best suited for lighter, standard-sized aluminum or thin-steel trailer doors. They provide snappy, clean performance for those who need a functional solution without the premium price tag.

While they may not offer the same longevity as high-end industrial models, their affordability makes them perfect for backup stock or older equipment that doesn’t warrant an expensive repair. They are an excellent value for the cost-conscious manager.

Gasspringsshop Stainless Strut: For All Weather

Corrosion is the silent killer of farm equipment, especially in regions with high humidity or frequent exposure to manure acids. Gasspringsshop stainless steel struts are specifically built to resist rust, ensuring the shaft remains smooth even when exposed to harsh environmental factors.

Standard steel struts often develop pitting after a few seasons, which shreds the internal seals and causes the unit to seize. Investing in stainless steel is a preventative measure that pays off by extending the interval between replacements in outdoor, exposed environments.

If the trailer is stored outdoors year-round, these are the only logical choice. They offer the longest service life in the presence of mud, rain, and livestock byproducts.

Suspa C16-08054 Gas Prop: Most Versatile Strut

Suspa is a trusted name in the industry for a reason, and the C16-08054 is the workhorse of their lineup. Its versatility comes from a design that adapts well to various door geometries and mounting angles found on utility trailers.

Whether the application involves a top-hinged door or a side-loading ramp, this prop provides a steady, controlled rate of movement. It is the gold standard for those who want a reliable, middle-of-the-road performer that fits almost any standard application.

This strut is the best choice for farmers who maintain multiple pieces of equipment and want a reliable, interchangeable part. It is consistent, easy to source, and highly dependable.

T-H Marine GSS-1200-2 Kit: Easiest Install

For those who view mechanical repairs as a hurdle rather than a hobby, the T-H Marine GSS-1200-2 kit provides everything required for a stress-free afternoon in the shed. The kit includes high-quality mounting brackets and hardware that align perfectly with the struts.

Many DIY attempts fail because the mounting hardware is mismatched or weak, leading to structural fatigue. This kit eliminates guesswork by providing a complete, matched system designed for high-stress trailer use.

It is highly recommended for farmers who want to save time on fabrication or bracket modification. If the priority is a quick, professional-grade installation, skip the individual parts and get the kit.

Choosing the Right Strut: Weight, Length, & Ends

Selecting the correct strut requires more than just finding one that fits the bolt holes. The weight of the ramp determines the necessary force, usually measured in pounds (lbs); underestimating this leads to a ramp that won’t stay open, while overestimating makes it nearly impossible to pull the door down.

• Measure Extended and Compressed Length: The strut must not bottom out or fully extend to its limit during operation, as this will damage the internal valve.
• Identify the Correct End Fitting: Most struts use ball-and-socket joints, but eyelets or clevis mounts are common on older trailers; ensure compatibility before purchase.
• Consider Mounting Geometry: The point where the strut attaches to the frame affects the leverage ratio, meaning a lighter strut might work if mounted further from the hinge.

Always lean toward a slightly higher force rating if the ramp is near the maximum weight capacity for a specific size. It is easier to overcome a little extra lift force than to struggle with a ramp that slowly descends on its own.

Safely Installing and Replacing Your Gas Struts

Replacing gas struts carries a risk of injury because of the high internal pressure within the cylinder. Always use a prop rod or a second person to hold the ramp in the fully open position before removing the old strut to prevent the door from dropping suddenly.

Clean the mounting points thoroughly with a wire brush or degreaser before installing the new hardware. This prevents grit from damaging the seals on the new strut, which is a common cause of premature failure in dusty farm environments.

When tightening the ball studs, avoid overtightening, as the threaded mounts on many trailer frames are susceptible to stripping. Use a thread-locking compound to ensure the vibration of travel does not cause the fasteners to back out over time.

Trailer Strut Maintenance for a Longer Lifespan

Preventative maintenance is minimal but essential for getting the most out of an investment. Wiping the exposed chrome rod with a dry, clean cloth once a month removes dust and grime that can act as an abrasive on the rubber seals.

Apply a very light coating of silicone-based lubricant to the rod if the action becomes stiff or makes a squeaking sound. Avoid oil-based lubricants, which attract dust and grit that can get pulled into the housing.

Periodically inspect the mounting brackets for signs of stress cracks or warping. If the bracket flexes while the door is moving, it creates misalignment, leading to side-loading forces that will cause the strut to leak gas or fail internally.

Troubleshooting Common Trailer Strut Problems

If the ramp refuses to stay open, it is usually a sign that the gas charge has leaked out or the temperature has dropped significantly. Gas struts are heat-sensitive, and a drop in winter temperatures can temporarily reduce the lift capacity; if performance returns in the summer, the strut is still good.

A strut that makes a hissing sound or exhibits oil leaking from the seal has suffered a catastrophic failure and requires immediate replacement. This usually happens when the strut has been subjected to a weight load beyond its rating or if the rod has been dented by debris.

If the door remains difficult to open even with new struts, check the hinges. Often, a “bad” strut is actually a symptom of rusted, stiff hinges that require a heavy dose of penetrating oil or total replacement to restore smooth motion.

Upgrading trailer door struts is one of those small, tactical improvements that significantly reduces the daily physical toll of farm management. By selecting the right force capacity and maintaining the mounting points, you ensure your equipment is always ready for the next haul. Taking the time to properly size and install these components now will prevent recurring maintenance headaches throughout the busy season.