9 Reliable Truck Bed Camper Shell Door Gas Shock Replacements for DIY Repairs

Few things are more frustrating than a heavy camper shell door that constantly drops on your head while you are trying to reach your gear. Over time, the gas shocks on truck toppers lose their pressure, turning a simple cargo run into a tedious, two-handed struggle. Fortunately, swapping out failing struts is a straightforward DIY project that restores instant utility and safety to your truck-bed living setup.

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How to Measure Your Camper Shell Gas Struts

Before ordering any replacement parts, taking precise measurements of your existing struts is critical to ensure proper clearance and operation. You must measure the gas shock when it is fully extended, measuring from the exact center of one ball socket to the center of the other. Do not measure the metal body alone; the entire distance between the connection points dictates how far your camper door will open.

Additionally, you need to know the compressed length of the shock, which is the measurement when the rod is fully pushed into the cylinder. If the compressed length of the new strut is too long, the door will not close all the way, putting immense stress on the hinges and glass. If it is too short, the strut will bottom out early and potentially rip the mounting brackets right out of the fiberglass frame.

Most standard truck topper doors utilize a 10mm ball socket connection. Verify this size by checking the metal studs mounted to your camper shell and window frame. Once you have the extended length, compressed length, and connector size, you are ready to match your dimensions with the correct replacement strut.

Understanding Gas Shock Force Ratings for Camper Doors

Gas shock force is measured in either pounds (lbs) or Newtons (N), and matching this rating to your specific door weight is vital. The rating is typically stamped directly onto the side of the original strut cylinder (note that 1 pound of force is roughly equal to 4.4 Newtons). If your existing struts are worn out and the markings have faded, you will need to estimate the weight based on the material of your hatch.

Force Conversion Reference: * 20 lbs ≈ 90 N  (Lightweight side windows) * 25 lbs ≈ 110 N (Standard cab-high glass doors) * 35 lbs ≈ 150 N (Heavy-duty rear glass hatches) * 40 lbs+ ≈ 180 N+ (Reinforced doors or wood/metal DIY hatches) 

Selecting a strut with too much force can cause severe damage to your camper shell. High-force shocks can bend mounting brackets, strip out sheet metal screws, or even shatter a tempered glass window when you attempt to pull it closed. Conversely, under-gunned struts will fail to hold the door open, especially in cold weather when the gas inside the cylinder contracts and loses pressure.

For standard glass rear doors, a pair of 25-pound to 35-pound struts is usually the sweet spot. If you have customized your truck topper door with wood cladding, insulation, or gear mounting racks, you will need to step up to a heavier-duty rating. Always replace struts in pairs to ensure even force distribution across the entire door frame.

Standard Lift Support – Suspa C16-08054 Gas Spring

The Suspa C16-08054 is the workhorse of the camper shell industry, offering a reliable, mid-range solution for standard setups. Its primary role is to restore factory-level lift to typical rear glass hatches without overstressing the mounting brackets. If your truck topper is a standard cab-high model from Leer, ARE, or SnugTop, this is often the exact specification used by original equipment manufacturers.

This specific model features a 15-inch extended length and a 26-pound (120 N) force rating per shock. Suspa is highly regarded for its precision engineering, utilizing high-grade materials that prevent gas leakage over years of exposure to the elements. The action is remarkably smooth, providing a controlled dampening effect at the very end of the opening stroke to prevent jarring stops.

• Extended Length: 15.00 Inches
• Force Rating: 26 lbs (120 N) per strut
• Connector Type: 10mm ball sockets

When installing these, ensure your mounting studs are clean and free of rust to allow the polymer socket to snap securely into place. These struts are optimized for moderate climates and standard weight profiles; they may struggle slightly in sub-zero temperatures if your door is on the heavier side.

Who it’s for: This is the ideal replacement for owners of standard, unmodified cab-high camper shells who want to replicate original factory performance. It is not suitable for custom heavy wood doors or high-rise toppers that require a longer stroke length.

Heavy-Duty Gas Strut – Apexstone 15-Inch 40lb Support

For truck owners who have added insulation, utility racks, or structural reinforcements to their topper doors, the Apexstone 15-Inch 40lb Support is built to handle the extra load. Standard struts will quickly sag under modified setups, but these heavy-duty shocks ensure your hatch swings wide and stays there. They are engineered to provide maximum lifting power in a standard 15-inch footprint.

Each strut in this pair delivers 40 pounds of lifting force, translating to a combined holding capacity that can easily support heavier composite or aluminum doors. The thick steel cylinder wall resists flexing under pressure, while the black nitride-coated shaft prevents pitting and corrosion from road salt and humidity.

• Extended Length: 14.96 Inches
• Force Rating: 40 lbs (178 N) per strut
• Connector Type: 10mm metal band ball sockets

Because of the high resistance, closing a door equipped with these shocks requires a firm downward pull. You must ensure that your mounting brackets are screwed into solid fiberglass reinforcement or metal framing, as the force can rip loose brackets right out of thin canopy shells.

Who it’s for: This product is perfect for DIY builders with customized, heavy rear doors, or those living in extreme winter conditions where standard gas springs lose their lifting power. It is not recommended for thin, single-pane glass doors, as the high force may crack the glass during closure.

Rear Window Lift Support – ARANA 15-Inch 35lb Struts

The ARANA 15-Inch 35lb Strut acts as a premium, high-durability replacement designed specifically for heavy rear glass frames that feature dual locking mechanisms. These dual-lock glass doors are naturally heavier than center-latch models and require a bit more leverage to lift comfortably. ARANA addresses this by offering a robust gas seal design that handles frequent daily cycling without losing pressure.

These struts utilize a multi-lobe seal system that makes them exceptionally leak-resistant, even when subjected to the dusty, bumpy dirt roads common in off-grid travel. The 35-pound force rating ensures that your rear door pops open with minimal effort, saving your lower back during quick gear runs.

• Extended Length: 15.00 Inches
• Force Rating: 35 lbs (156 N) per strut
• Connector Type: 10mm nylon ball sockets with steel retaining clips

Installation is incredibly easy thanks to the pre-installed metal clips that secure the socket to the ball stud. Make sure to apply a small dab of lithium grease inside the socket before snapping it on to ensure smooth rotation as the door opens and closes.

Who it’s for: Perfect for overland travelers and truck campers who frequently access their gear on dirt roads and need a durable, mid-to-heavyweight lift support. It is not ideal for small, lightweight side-access windows where 35 pounds of force would make closing the window difficult.

Side Access Door Strut – Maxpow 17-Inch Gas Springs

Side access doors, often called “windoors,” require a different geometry than rear hatches to allow you to reach inside your truck bed from the side panels. The Maxpow 17-Inch Gas Spring is designed with a longer stroke to lift these side doors high enough so that you do not bump your head while grabbing tools or storage bins.

With an extended length of 17 inches and a 35-pound force rating, these shocks provide the extra reach needed to clear the roofline of cab-high and mid-rise camper shells. Maxpow uses a seamless steel tube construction to prevent bending when windoors are left open in windy conditions, which is a common failure point for cheaper, thin-walled struts.

• Extended Length: 17.13 Inches
• Force Rating: 35 lbs (156 N) per strut
• Connector Type: 10mm steel ball sockets

Keep in mind that the longer length means these struts take up more physical space when compressed. You must measure the mounting points on your side window frame carefully to ensure there is enough clearance inside the window track when the side panel is fully latched shut.

Who it’s for: This is the go-to option for truck owners with side-opening utility doors who need maximum clearance for side-loading gear. It is not suitable for standard rear doors that are designed strictly for 15-inch or shorter struts.

Compact Gas Spring – CCIYU 14-Inch Lift Supports

If you have a compact truck topper, a low-profile cab-high shell, or small built-in toolboxes, standard 15-inch shocks will be too long. The CCIYU 14-Inch Lift Support fills this niche by offering a shorter, highly compact package that fits into confined spaces without sacrificing reliability. This strut is critical for maintaining smooth operation on smaller hatches where space is at a premium.

These shocks deliver 20 pounds of force, which is perfectly tuned for smaller, lighter-weight glass or aluminum panels. The internal guide sleeve and specialized piston design minimize friction, allowing for an incredibly quiet and effortless opening cycle that will not shake your entire camper setup.

• Extended Length: 14.00 Inches
• Force Rating: 20 lbs (89 N) per strut
• Connector Type: 10mm composite ball sockets

Because these are designed for lighter loads, they are incredibly easy to compress by hand during installation. However, you should avoid using these on full-sized rear doors, as they simply do not contain enough volume or pressure to hold up larger glass panels safely.

Who it’s for: Ideal for mid-sized or compact truck camper shells, side-access toolboxes, and small ventilation hatches. It is not designed to support full-sized, heavy rear glass doors on full-size trucks.

OEM Replacement Strut – Stabilus Lift-O-Mat Gas Spring

When you want to replace your old struts with the absolute highest quality available, the Stabilus Lift-O-Mat is the industry standard. Stabilus invented the gas spring, and their Lift-O-Mat line is the factory-installed choice for top-tier canopy manufacturers worldwide. This strut functions as a premium, long-lasting replacement that restores the signature, ultra-smooth factory opening motion.

The secret to the Stabilus design lies in its engineered dampening technology, which slows down the door’s travel during the final inches of expansion. This prevents the harsh “pop” and subsequent frame vibration that can loosen camper shell mounting clamps over time. The build quality features an exceptionally durable powder-coated cylinder and an eco-friendly chromium-free piston rod.

• Extended Length: 15.00 Inches
• Force Rating: 26 lbs (115 N) per strut
• Connector Type: 10mm heavy-duty ball joints

While these struts are slightly more expensive than generic budget brands, their longevity and superior ride control make them a smarter investment for long-term truck dwellers. They hold up to temperature fluctuations better than almost any other shock on the market.

Who it’s for: Recommended for truck owners who prioritize OEM-level refinement, smooth dampening, and maximum longevity for their daily-driven camper setup. It is not for budget-constrained buyers who simply want the cheapest quick-fix option.

Rear Hatch Gas Spring – Lift Support Depot PM1027-W

The Lift Support Depot PM1027-W is designed for those who put their truck camper through demanding off-road conditions. Dust, dirt, and mud quickly ruin standard gas strut seals, but this model features a specialized nitride-coated rod and a custom-molded wiper seal to keep contaminants out of the pressurized chamber. It is built to survive in the rugged environments that off-grid campers call home.

This strut provides 30 pounds of lifting force over a 15-inch extended length, making it highly versatile for a wide range of standard truck cap doors. The metal band connector clips are exceptionally strong, ensuring that the strut will not pop off the ball stud when bouncing down corrugated washboard dirt roads.

• Extended Length: 15.00 Inches
• Force Rating: 30 lbs (133 N) per strut
• Connector Type: 10mm metal socket with spring-steel retaining bands

Note that these are often sold as individual units rather than pairs, so make sure to update your purchase quantity to two when swapping out both sides of your rear door.

Who it’s for: This is the best choice for overlanders, off-road enthusiasts, and full-time truck campers who operate in dusty, harsh desert or muddy forest environments. It is not necessary for casual pavement-only drivers who do not expose their trucks to heavy dirt and grime.

Multi-Fit Lift Strut – Vepagoo 15-Inch Gas Springs

If you are dealing with an older camper shell where the original hardware has rusted out or stripped, the Vepagoo 15-Inch Gas Spring kit is a lifesaver. This kit serves as a comprehensive replacement package, providing not just the gas struts, but also new 10mm ball stud brackets and mounting screws. This saves you a frustrating trip to the hardware store when your old brackets are unusable.

The struts themselves offer 35 pounds of force, which is robust enough to lift standard rear windows and keep them secure in stiff breezes. The cylinders are treated with a multi-layer black paint finish to resist rust, and the high-strength synthetic sockets snap tightly onto the included studs.

• Extended Length: 14.96 Inches
• Force Rating: 35 lbs (156 N) per strut
• Connector Type: 10mm composite sockets with replacement ball brackets included

When mounting the new brackets, ensure you seal the screw holes with a high-quality marine-grade silicone or polyurethane sealant to prevent water from slowly seeping into your camper shell’s fiberglass core.

Who it’s for: Ideal for older truck cap restorations, DIY custom builds, or any situation where the original mounting brackets are rusted, bent, or entirely missing. It is not needed if your existing ball studs are still in pristine, reusable condition.

Reinforced Lift Support – Boxi 17-Inch Gas Struts

For larger truck caps, such as high-rise camper shells (like the Leer 180 or ARE MX series), standard 15-inch struts simply do not offer enough travel. The Boxi 17-Inch Gas Strut provides the extra physical length and heavy lifting capacity required to manage these oversized, high-clearance rear doors. Its primary role is to maximize the vertical opening height of high-roof caps.

With a 40-pound force rating, these struts are engineered to move larger panes of glass quickly and hold them securely aloft. Boxi utilizes a reinforced internal piston assembly that resists binding, even when the struts are mounted at odd, non-linear angles common in custom high-rise cap designs.

• Extended Length: 17.00 Inches
• Force Rating: 40 lbs (178 N) per strut
• Connector Type: 10mm high-impact nylon ball sockets

Because of the high pressure and extra length, these struts place a significant amount of leverage on the top hinges of your camper door. Check your hinges for play or loose screws before installing these to prevent alignment issues down the road.

Who it’s for: Perfect for owners of high-rise, wedge-style, or extra-tall commercial truck caps that require a longer strut footprint and higher weight capacity. It is not suitable for standard, cab-high toppers where a 17-inch strut will physically prevent the hatch from closing.

Step-by-Step Installation Tips for Camper Shell Doors

Swapping out gas struts is a straightforward DIY task that requires only a few basic hand tools. Before you begin, find a sturdy piece of wood or have a helper hold the camper door fully open; never trust your head or hands to support a heavy glass window with failing struts.

Simple Strut Removal Process: 1. Locate the thin metal spring clip on the back of the ball socket. 2. Insert a small flathead screwdriver under the clip and slide it outward. 3. Gently pull the socket away from the ball stud to release it. 

When mounting the new struts, pay close attention to their orientation. You should always install gas springs with the rod pointing down and the body pointing up when the door is closed. This orientation ensures that the internal oil pool stays in contact with the main piston seal, keeping it lubricated and preventing the nitrogen gas from slowly leaking out over time.

Once both struts are snapped onto their ball studs, test the door by closing it slowly. Watch the brackets closely for any flexing or binding; if you notice the fiberglass shifting or the brackets bending, double-check your compressed length measurements. A properly installed set of gas shocks should whisper open smoothly and require only a gentle, steady pull to latch shut.

Ready to Restore Your Rig?

Product Name	Extended Length	Force Rating (Per Strut)	Best Use Case
Suspa C16-08054	15.00″	26 lbs	Standard cab-high OEM replacement
Apexstone 15-Inch	14.96″	40 lbs	Insulated or heavy DIY custom doors
ARANA 15-Inch	15.00″	35 lbs	Heavy-duty rear glass hatches
Maxpow 17-Inch	17.13″	35 lbs	Side access “windoor” panels
CCIYU 14-Inch	14.00″	20 lbs	Compact shells and toolboxes
Stabilus Lift-O-Mat	15.00″	26 lbs	Premium OEM-grade dampening
Lift Support Depot PM1027-W	15.00″	30 lbs	Dusty, off-road overland builds
Vepagoo 15-Inch	14.96″	35 lbs	Restorations needing new brackets
Boxi 17-Inch	17.00″	40 lbs	High-rise or extra-tall truck caps

Replacing worn-out camper shell struts is a low-cost, high-reward project that immediately improves your daily interaction with your truck rig. By matching the correct length, selecting the appropriate force rating, and mounting the shocks in the correct “rod-down” orientation, you can enjoy hands-free access to your gear for years to come. Take your measurements, pick the perfect support from this list, and make propping your camper door open with a stick a thing of the past.