Best Trailer Air Bag Kit for Replacement and Towing Support

#1 · Best Overall

1. STILEALUS Air Spring 4-Pack

Best for: Four-bag trailer replacement set.

Why it ranks #1: Four replacement springs and listed Hendrickson, Intraax, and Van Traax references make this the most directly trailer-focused option; verify the existing part number.

Four air spring bags come together in this STILEALUS set, enabling a full-set replacement rather than a one-corner repair. Its listed interchange references cover specified Hendrickson trailer and Intraax and Van Traax applications, making the old spring’s OE or interchange number the key starting point for a fit decision.

The four-piece set supports replacement across all wheels, which the listing connects with balanced ride and consistent performance. Its compatibility references include S-20900, S-21800, C-21800, W01-358-8709, and 1R13-159, among other listed numbers, so checking the existing spring’s OE or interchange number helps narrow fitment. The product is identified for trucks and includes other accessories; verify the specific reference before ordering rather than relying on vehicle type alone.

Skip it if you need a complete onboard compressor and tank system; Vixen Air VXO4852DB supplies a 5-gallon tank and dual compressors.

This set suits a truck or trailer owner replacing four air springs whose existing part references match the listing. Its breadth of listed interchange numbers is useful, but the correct OE or interchange match remains essential.

Listed on Amazon as: 4 Pack of Air Spring Bag for Trucks Fits for Hendrickson Trailer S-20900, S-21800, C-21800, Fits for AAT 23K Models Intraax & Van Traax, and Fits for W01-358-8709, 1R13-159

#2 · Best Towing Support

2. Air Lift 57229 LoadLifter

• Material: Alloy Steel, Nylon, Rubber
• Weight: 29 lb
• Material Type: Alloy Steel, Nylon, Rubber

Best for: Adjustable towing and hauling support.

Why it ranks #2: Its LoadLifter 5000 system states up to 5,000 pounds of load-leveling capacity and adjustable 5–100 PSI for towing and hauling, subject to fitment.

An adjustable 5–100 PSI range lets the Air Lift LoadLifter 5000 adapt its support to daily driving or heavier towing and hauling. Its stated capacity of up to 5,000 pounds targets rear sag, squat, and bottoming out, making load changes the central use case for this air-spring kit.

The adjustable pressure range lets users lower pressure for daily-driving comfort or increase it for trailer towing and loaded cargo, according to the listing. Up to 5,000 pounds of load-leveling capacity supports the stated aim of reducing rear sag, squat, and bottoming out. Two air springs, mounting brackets, installation hardware, and an illustrated guide are included, bringing core installation components together. The supplied fit details do not identify a specific vehicle application, so check vehicle fitment before choosing this kit.

Skip it if you need a kit explicitly listed for a 2014–2023 Ram 2500; Rough Country 10029 names that application.

This kit suits a buyer seeking adjustable support for towing, campers, boats, or work equipment, with pressure changes for different loads. Because the supplied fit details name no vehicle application, verify suitability for your vehicle.

Listed on Amazon as: Air Lift 57229 LoadLifter 5000 Air Spring Suspension Kit

#3

3. Air Lift 57399 LoadLifter

• Material: Alloy Steel, Nylon, Rubber
• Weight: 34 lb
• Material Type: Alloy Steel, Nylon, Rubber

Best for: Fifth-wheel-compatible load support.

Why it ranks #3: The two-spring kit states up to 5,000 pounds of load-leveling capacity and includes brackets and hardware; its fitment excludes cab-and-chassis applications.

Up to 5,000 pounds of load-leveling capacity gives the Air Lift LoadLifter 5000 a clear role in reducing rear sag and squat while towing or hauling. Its fit notes specifically include factory in-bed hitch systems and most side-mount fifth-wheel hitch applications, subject to the stated exclusions.

The air springs are intended to reduce sag, squat, and bottoming out under heavy loads, helping keep a truck more level with campers, boats, or work equipment aboard. The kit includes two springs, mounting brackets, hardware, and an illustrated guide, bringing the installation components together. Fitment is specific: it fits factory in-bed hitch systems and most side-mount fifth-wheel applications, but not cab-and-chassis models; models without a fifth-wheel hitch are also listed as compatible.

Skip it if you drive a 2014–2023 Ram 2500 and want a model-specific kit; Rough Country 10029 lists that application.

Consider this kit for towing or hauling when its stated 5,000-pound capacity and hitch notes match your setup. It is not for cab-and-chassis applications, so check that boundary before choosing it for a work truck.

Listed on Amazon as: Air Lift 57399 LoadLifter 5000 Air Spring Suspension Kit

#4 · Best Ram Fit

4. Rough Country Ram 2500 Kit

• Material: Alloy Steel, Nylon, Rubber
• Material Type: Alloy Steel, Nylon, Rubber

Best for: Ram 2500 towing support.

Why it ranks #4: Made for Ram 2500 models from 2014–2023, it offers up to 5,000 pounds of load support and includes air bags, brackets, fittings, and hardware.

Up to 5,000 pounds of load support targets rear-end sag under towing or hauling loads on the listed 2014–2023 Ram 2500 application. Rough Country pairs its air chambers with an internal bump stop and DOT-approved airlines, a combination aimed at loaded suspension support and durable line routing.

The double-convoluted air cushions and internal bump stop support the kit’s load-leveling role, while the listing says it helps prevent bottoming out and minimize trailer sway. Installation components include mounting brackets, U-bolt plates, inflation valves, and 90-degree fittings. Push-to-connect air fittings and the stated use of standard tools can simplify home installation. The fit is limited to the named Ram 2500 model years, so this is not a universal trailer air-bag kit.

Skip it if you need a replacement spring set for Hendrickson trailer models; STILEALUS JHABC20003-new lists specified trailer interchange numbers.

This kit fits buyers seeking load support and sway reduction on a listed 2014–2023 Ram 2500, with home installation using standard tools. Its stated application is vehicle-specific, not a universal trailer fit.

Listed on Amazon as: Rough Country Air Spring Kit for Ram 2500 (2014-2023) – Minimizes Trailer Sway, Prevents Bottoming Out

#5 · Highest Capacity

5. RETRUE Universal Air Bags

Best for: Adjustable high-capacity load support.

Why it ranks #5: The listing states 6,000 pounds of load-leveling capacity and adjustable 5–100 PSI, but provides no specific trailer fitment or vehicle compatibility list.

A listed 6,000-pound load-leveling capacity sets the RETRUE kit apart for buyers carrying substantial loads, while its 5–100 PSI adjustment range enables pressure tuning for changing needs. The product also describes an upgraded three-chamber design, giving its air-bag configuration a specific point of distinction.

Pressure adjustment from 5 to 100 PSI lets users tune the suspension to different load situations, and the stated 6,000-pound capacity frames the kit’s load-leveling role. RETRUE cautions that the total weight, including the truck bed and cargo, must not exceed that limit. The three-chamber design is identified as an upgrade from a traditional two-chamber design. Included components are air bags and air fittings, so the listed package is not a compressor-and-tank system.

Skip it if you need a replacement set matched to Hendrickson trailer interchange numbers; STILEALUS JHABC20003-new lists those references.

This RETRUE kit suits buyers who want adjustable air-bag load support and can keep total truck-bed and cargo weight within its stated capacity. Its listed components are bags and fittings, not a full onboard air supply.

Listed on Amazon as: RETRUE Universal Air Bags Air Suspension Kit 6000 Lbs Capacity

#6 · Universal Trailer Bags

6. eLifecenter Triple Bellow Bags

• Weight: 12.29 lb

Best for: Universal triple-bellow spring option.

Why it ranks #6: These universal triple-bellow bags list trucks and trailers among applications, with 1/2-14 NPT ports and 2600-pound capacity; dimensions still require checking.

A triple-bellow construction gives this eLifecenter air spring increased suspension travel, enabling a smoother, more controlled ride when carrying heavy loads. The listing describes it for a range of vehicle types, including trucks, trailers, buses, and vans, while its mounting dimensions make size checks important.

The listed 2600-pound load capacity and triple-bellow structure serve buyers seeking load support with increased flexibility and travel. A 1/2-14 NPT single port and 3/8-16 UNC mounting holes provide specific connection and attachment dimensions to compare with an existing setup. Its 10.12-inch design height and approximately 7-inch body width also help with space checks; the listing notes width grows to about 7.5 inches after inflation at 100 PSI.

Skip it if you want a complete kit with compressors, tank, and four bags; Vixen Air VXX1209FW/4852DBF includes those components.

Choose this spring if its triple-bellow travel and listed dimensions suit your truck, trailer, bus, or van setup. It is a spring rather than a complete onboard air system, and careful dimensional matching matters.

Listed on Amazon as: Universal 2600 lbs Triple Bellow Air Suspension Bags 1/2" NPT Single Port

#7

7. Vixen Air VXX1209FW Kit

• Material: Alloy Steel
• Weight: 98 lb
• Material Type: Alloy Steel

Best for: High-demand onboard air setup.

Why it ranks #7: This broad onboard system includes four 2600-style bags, a five-gallon tank, and dual 200 PSI compressors, but lacks trailer-specific fitment information.

Two 200 PSI compressors feed a 5-gallon, nine-port tank, giving this Vixen Air kit substantial onboard air capacity for demanding suspension and towing setups. Its four 2600-style air bags and dual-gauge, four-way switch panel make it a complete system for buyers who need both air supply and load-leveling components.

The dual compressors increase tank refill speed, while the 5-gallon tank provides a larger air reserve for high-demand use. Four 2600-style bags, high-flow electric valves, water traps, and a dual-gauge panel with four-way control bring key suspension and air-management parts together. The kit also includes basic installation hardware. At 98 pounds and 18 inches in each listed dimension, it calls for room and capacity to accommodate a substantial onboard system.

Skip it if you need replacement air springs for a specific Hendrickson trailer; STILEALUS JHABC20003-new lists trailer air-spring fitments.

Choose this Vixen Air package if your truck, RV, or car needs an onboard air system paired with four air bags for towing or load leveling. Account for its 98-pound weight and the space its tank and compressors require.

Listed on Amazon as: Vixen Air Suspension Kit, 200 PSI Compressors, 5 Gallon Tank, 4 Air Bags Universal Onboard Air Ride System for Truck, RV, Car | for Heavy Load Leveling, Towing, Train Horns, VXX1209FW/4852DBF

#8

8. Vixen Air VXO4852DB System

• Material: Stainless Steel
• Material Type: Stainless Steel

Best for: Dual-compressor onboard air supply.

Why it ranks #8: It supplies a five-gallon tank and dual 200 PSI compressors for onboard air, but the listed package does not include air bags for trailer replacement.

Two 200 PSI compressors, each listed at 1.8 CFM, refill a 5-gallon steel tank for buyers needing onboard air for suspension support. The system also lists compatibility with high-pressure air horns and power tools, giving the tank uses beyond air bags when those applications need onboard air.

The dual compressors and 5-gallon tank form the core air supply, while a thermal overload protector switch is listed to help prevent overheating during operation. A nine-port tank offers multiple connection points, and the included pressure switch, drain valve, fuses, relays, and mounting hardware support system setup and maintenance. Remote filter installation kits are included as well. This is an air-supply system; the listed components do not include air bags.

Skip it if you need a complete suspension package with four air bags; Vixen Air VXX1209FW/4852DBF includes four bags with its compressors and tank.

Pick this Vixen Air system if you need a 12-volt onboard supply for suspension, an air horn, or a power tool. It includes tank and compressors but not air bags, so plan for those separately if needed.

Listed on Amazon as: Vixen Air 12V Air Suspension Kit with 200 PSI Compressors and 5 Gallon Tank Onboard Air Ride System for Truck, RV, Car | for Air Bags, Air Springs, Heavy Load Leveling, Towing, Train Horns, VXO4852DB