air cup lift systemRegular and XL air cups

Max car weight
• Max total car weight for the regular air cups: 1500 kg / 3300 lbs   (or max axle weight: 1000 kg / 2200 lbs)
• Max total car weight for the XL air cups: 1950 kg / 4300 lbs   (or max axle weight: 1300 kg / 2850 lbs)

• The diameter of the regular air cup is 110 mm
• The diameter of the XL air cup is 120 mm

Outer spring diameter
• The outer diameter must be less than 89mm for the regular air cups.
• The outer diameter must be less than 99mm for the XL air cups.

We always recommend to use the XL air cups if you have enough space for the 120mm diameter (regular air cup is 110mm in diameter).
Not sure which one you need? Contact us for more info.



Coilover requirements

The air cups will fit any brand coilovers, as long as they meet the requirements. Make sure the dimensions match your coilover, we strongly recommend to measure with a caliper. If your coilovers have other dimensions, please contact us.

• The outer diameter must be less than 89mm for the regular air cups, and less than 99mm for the XL air cups.
• The inner diameter must be at least 61 mm.

Coilover shaft
• Available for 6 different coilover shaft diameters: 12,5mm, 14mm, 15mm, 18mm, 20mm and 22mm. Custom diameters on request.


Linear springs
The air cup lift system will only fit on straight springs as shown in the right figure. The system will not fit on ”barrel” springs as shown in the left figure. If you have ”barrel” springs, you can install straight springs.

High spring rates
If you’re using extreme high spring rates, much higher than the original rates that came with your coilovers, then you probably can’t use the full 50mm lift from the air cups. Due to the extreme high spring rates, the weight of the car won’t compress the springs and damper enough to create a stroke for the air cups to lift. This can be solved by using helper springs. Contact us for more info.



• The diameter of the regular air cup is 110 mm
• The diameter of the XL air cup is 120 mm
The fitting is 17mm.

The air cup are only 20mm thick in the lowest position. Depending on your coilovers and vehicle, the air cups will take up a certain space.  At best, you win some space when installing the air cups, in most cases you will lose around 20mm. If you have enough travel left on your coilovers to lower it, it won’t be a problem. If not, you can install shorter springs to compensate this, contact us for more info.

How does it work?

The air cup is mounted on the top of the spring and just act like a spacer. When you put pressure on the air cups, the air cup will expand and the car will raise with 50mm. Air cup suspension is a perfect system to drive your (extremely) lowered car across obstacles without any risk of ground contact.

The air cup lift system does not affect the ride quality and performance of your coilovers.

The process of assembly is clearly described in the manual.
Click here for an online view of the manual.

An air cup lift system is also known as air cup suspension, an air cup kit or a coilover lift system.