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Your truck sits dead level all week. Then you drop a gooseneck on the ball, or load the bed for a job, and the back end squats, the nose lifts and the steering goes light. SPELAB builds rear air suspension kits for exactly that moment. They’re air springs that bolt in between the frame and the rear axle, and they take load only when you ask them to.
That last part is the whole point. Empty, you run low pressure and keep the ride you already have. Hooked up, you add air and bring the rear back towards level. SPELAB rates its kits at up to 7,500lb of load-levelling capacity across an adjustable 0 to 150 PSI range, and builds the air spring from 6mm multi-layer rubber it says it tests to 435 PSI burst pressure.
The range runs to four kits. They cover Ford Super Duty, Ram 2500, and Chevrolet and GMC 1500 and 2500HD. Prices ran from US$249 to US$329 on the SPELAB site on 21 August 2026, and the brand is running code AFFILIATE for 15 per cent off the rear air suspension kits.
At a Glance
- 5th-wheel and gooseneck towing: Ford Super Duty Kit
- Late-model Ram 2500 owners: Ram 2500 Kit
- Half-tons carrying a loaded bed: Chevrolet and GMC 1500 Kit
- Older three-quarter-ton work trucks: Chevrolet and GMC 2500HD Kit
1. SPELAB Rear Air Suspension Kit for 2011-2016 Ford F-250 and F-350 Super Duty
The Super Duty kit is the one SPELAB points at 5th-wheel and gooseneck work, and it’s the most expensive of the four. It fits 2011 to 2016 Ford F-250 and F-350 Super Duty trucks, and it bolts between the frame and the rear axle rather than replacing anything you already have.
SPELAB rates the air springs at up to 7,500lb of load levelling, with an operating range of 0 to 150 PSI. Run it soft when the bed is empty and the truck rides the way it always did. Add air when the trailer goes on and the rear comes back towards level. The kit ships with the springs, the mounting brackets, the air line and the hardware, as shown in SPELAB’s own kit photo.
- Fits: 2011-2016 Ford F-250 and F-350 Super Duty
- Load-levelling capacity: Up to 7,500lb, per SPELAB
- Operating pressure: 0 to 150 PSI, adjustable
- Burst pressure: 435 PSI, per SPELAB
- Air spring: 6mm multi-layer rubber, no jounce bumper
- Price: US$329 on the SPELAB site, 21 August 2026
2. SPELAB Rear Air Suspension Kit for 2014-2022 Ram 2500
This is the SPELAB kit for 2014 to 2022 Ram 2500 trucks, and it’s the same air spring specification as the Super Duty version at a lower price. Check fitment first: the year range is narrow and it does not cover the 1500.
The numbers SPELAB quotes are the same across the range. Up to 7,500lb of load-levelling capacity, 0 to 150 PSI of adjustment, and a 6mm multi-layer rubber air spring the brand says it tests to 435 PSI burst pressure. The design leaves out the jounce bumper, which SPELAB says gives the spring more air volume and a more compliant ride when the truck is unloaded.
- Fits: 2014-2022 Ram 2500
- Load-levelling capacity: Up to 7,500lb, per SPELAB
- Operating pressure: 0 to 150 PSI, adjustable
- Burst pressure: 435 PSI, per SPELAB
- Air spring: 6mm multi-layer rubber, no jounce bumper
- Price: US$259 on the SPELAB site, 21 August 2026
3. SPELAB Rear Air Suspension Kit for 1999-2018 Chevrolet Silverado 1500 and GMC Sierra 1500
The half-ton kit covers a long run of trucks: 1999 to 2018 Chevrolet Silverado 1500 and GMC Sierra 1500. If you use a 1500 for a loaded bed, a boat or a small camper rather than a gooseneck, this is the SPELAB kit that fits.
Capacity is the same headline figure as the heavier kits, up to 7,500lb, but treat that as the rating of the air springs rather than a new limit for the truck. A 1500 has its own payload number on the door jamb sticker and air springs do not change it. What they change is how level the truck sits inside that number.
- Fits: 1999-2018 Chevrolet Silverado 1500 and GMC Sierra 1500
- Load-levelling capacity: Up to 7,500lb, per SPELAB
- Operating pressure: 0 to 150 PSI, adjustable
- Burst pressure: 435 PSI, per SPELAB
- Air spring: 6mm multi-layer rubber, no jounce bumper
- Price: US$259 on the SPELAB site, 21 August 2026
4. SPELAB Rear Air Suspension Kit for 2001-2010 Chevrolet Silverado 2500HD and GMC Sierra 2500HD
The oldest fitment in the range, and the cheapest kit. It covers 2001 to 2010 Chevrolet Silverado 2500HD and GMC Sierra 2500HD trucks, which is the era a lot of people are still working rather than replacing. SPELAB sells it with the same air spring specification as the newer kits.
On a truck this age, check the condition of what the kit bolts to before you order. The brackets need solid frame and axle mounting points, and rust is the usual reason an air spring install turns into a longer job than the instructions suggest.
- Fits: 2001-2010 Chevrolet Silverado 2500HD and GMC Sierra 2500HD
- Load-levelling capacity: Up to 7,500lb, per SPELAB
- Operating pressure: 0 to 150 PSI, adjustable
- Burst pressure: 435 PSI, per SPELAB
- Air spring: 6mm multi-layer rubber, no jounce bumper
- Price: US$249 on the SPELAB site, 21 August 2026
How to Choose a Rear Air Suspension Kit
Fitment comes first and it’s not negotiable. Each SPELAB kit is cut for one family of trucks and one year range, so a Silverado 1500 kit will not bolt to a 2500HD. Check the year, the model and the load rating on your truck against the kit before you order. If you’re still shopping for the truck itself rather than the parts, we’ve driven the current crop, from the 2026 Toyota HiLux to SLATE’s modular electric pickup.
Understand what an air spring does and what it does not. It levels a loaded truck, which helps keep the steering and the headlights pointed where they should be. It does not raise your truck’s payload rating or its GVWR. SPELAB’s 7,500lb figure is the capacity of the air springs, not a new limit for your vehicle. The numbers on your door jamb sticker still decide what you can legally carry and tow.
Then work out how you’ll change the pressure. The kits SPELAB photographs include the air springs, the mounting brackets, the air line and the hardware. An on-board compressor and gauge, which is how you adjust pressure from the cab rather than at a servo, is a separate decision. Check the listing for what ships in your box before you plan the install.
SPELAB Air Suspension FAQs
SPELAB makes four kits. They cover 2011-2016 Ford F-250 and F-350 Super Duty, 2014-2022 Ram 2500, 1999-2018 Chevrolet Silverado 1500 and GMC Sierra 1500, and 2001-2010 Chevrolet Silverado 2500HD and GMC Sierra 2500HD.
SPELAB rates the kits at up to 7,500lb of load-levelling capacity, with a 0 to 150 PSI adjustable operating range and a 435 PSI burst pressure the brand says it tests to.
No. Air springs level a loaded truck, but they do not change the payload rating or GVWR set by the manufacturer. The figures on your door jamb sticker still apply.
SPELAB supplied code AFFILIATE for 15 per cent off its rear air suspension kits. Check the code is still valid at the checkout.
If your truck spends most of its life empty and only occasionally hauls, an adjustable air spring is the sensible middle ground: support when the trailer is on, your normal ride when it’s not. See the full SPELAB rear air suspension range for current pricing and fitment.
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