Take a load off with Polyair

By Polyair


Whether you’re a tradie loaded up with tools or heading off on a family road trip with the caravan in tow, springs are designed to make every drive a safe and comfortable one.

With a few simple tips, you can ensure your springs will have a long life in your vehicle and will make for a carefree road trip this summer!

Know your height

The first thing we recommend, is to know what the height is of your vehicle before you load up or adjust your springs.

The best way to do this is to;

  1. Park your vehicle on flat, level ground and remove any added weight from the car
  2. Then measure from the centre of the wheel, to the top (centre) of the wheel guard.

This measurement will allow you to determine what pressure to run when loaded up or towing. The intention of airbags is not to raise the vehicle, but simply to maintain the unladen ride height when loaded up. This allows all your suspension components to function as intended.

Minimum and maximum pressures

Keeping an eye on your minimum PSI is very important to avoid damage to your kits; making sure you always have pressure will avoid your kits from pinching or bottoming out. It’s important to note that a minimum PSI is based on a completely empty vehicle. So, if you have constant loads such as permanently fixed tool boxes, fridges, draw systems, etc, you may need more than the minimum pressure.

Again, it comes back to the measurements taken before loading up. If it doesn’t look right, it most likely isn’t. (never exceed your vehicles GVM rating)

Specifically, if you are running a Polyair Bags each series has its’ own minimum and maximum PSI ratings. It is important to know these pressures to keep your airbags in their best condition.

  • Red Series = min 5PSI – max 30PSI
  • Ultimate Series = min 5PSI – max 60PSI
  • Bellow & Dominator Series = min 5PSI – max 100PSI

Fill up, before you load up

A very helpful tip, for coil sprung kits (including Polyair Red Series & Polyair Ultimate Series) is to fill up your airbags before you load the vehicle.

Why is this? Airbags will naturally squeeze through the gaps in the coil springs (don’t worry, this is supposed to happen). When the airbags are slightly bulging into the spring gaps, this effectively increases the spring rate. If you load your vehicle before you fill up your airbags the spring gaps close, making it difficult for the airbags and spring to work most efficiently.

Before you load up, fill up your airbags to a high PSI then load up your vehicle – ensuring you also do not exceed the maximum PSI rating. After you have loaded up your vehicle, release the pressure until the vehicle is sitting back at the same height prior to being loaded (using your unloaded measurement taken earlier). Simple as that!

Long term maintenance

Airbags are fairly very low maintenance once installed. In fact the more you use them, the longer the will last! We recommend periodically checking your pressures, either with a compressor kit or tyre pressure gauge.