The Complete Guide to Air Bags for Towing and Preventing Squatted Trucks

If your truck sags when pulling a trailer, you’re not alone. Squatted trucks are one of the most common problems drivers face when towing campers, boats, or heavy equipment.

The good news is that air bags for towing provide one of the most effective solutions for restoring ride height, improving towing stability, and preventing suspension strain.

But one important question remains:

How much PSI should you put in air bags when towing?

In this guide, we’ll explain:

• The correct air bag pressure for towing

• A practical air suspension pressure chart

• How to avoid squatted trucks

• When to consider truck suspension upgrades for better towing performance

Why Squatted Trucks Are a Problem When Towing

A squatted truck happens when the rear suspension compresses under the weight of a trailer or cargo load.

This can create several serious issues:

• Reduced steering control

• Headlights pointing upward and blinding oncoming drivers

• Increased trailer sway

• Poor braking performance

• Premature suspension wear

Many truck owners initially try to ignore a squatted truck stance, but over time it can negatively affect safety and handling.

This is why many drivers install air bags for towing as part of their truck suspension upgrades.

Air suspension systems allow drivers to adjust the truck air bag PSI based on the load, restoring proper ride height and maintaining better stability on the road.

What Are Air Bags for Towing?

Air bags for towing (also known as air helper springs or air suspension systems) are inflatable rubber springs installed between the frame and axle of your truck.

Their purpose is simple:

• Support heavy loads

• Prevent squatted trucks

• Improve towing stability

• Reduce suspension strain

When towing heavy trailers, air bags for towing allow you to increase air bag pressure to counteract the added weight.

This keeps your truck level and improves driving confidence.

How Much Air Bag Pressure for Towing?

Most air suspension systems operate within a 5–100 PSI range.

However, the correct air bag pressure for towing depends on several factors:

• Trailer tongue weight

• Cargo weight in the truck bed

• Vehicle suspension design

• Road conditions

As a general rule:

• Minimum pressure: 5 PSI

• Typical towing PSI: 25–60 PSI

• Heavy loads: 60–90 PSI

The goal is not simply increasing pressure but eliminating the squatted truck stance while maintaining ride comfort.

Air Suspension Pressure Chart (Quick Setup Guide)

Here is a simple air suspension pressure chart to help determine the right PSI when using air bags for towing.

This air suspension pressure chart provides a starting point. Final pressure should always be adjusted until your truck returns to a level stance without appearing squatted.

Step-by-Step: Setting Air Bag Pressure for Towing

Step 1 – Start With Minimum PSI

Begin with the minimum recommended pressure, usually 5 PSI.

Running less than this can damage the air bags.

Step 2 – Hitch Your Trailer

Once the trailer is connected, observe your truck's stance.

If the rear of the vehicle drops noticeably, you are dealing with a squatted truck.

This is where air bags for towing become extremely useful.

Step 3 – Increase Pressure Gradually

Add air slowly until:

• The truck sits level

• The rear suspension stops sagging

• Steering feels stable

Correct truck air bag PSI eliminates most squatting issues.

Step 4 – Test Driving Stability

Drive a short distance and evaluate:

• Trailer sway

• Steering response

• Ride comfort

Adjust pressure slightly if necessary.

Why Air Bags Are One of the Best Truck Suspension Upgrades

Many drivers consider air bags for towing to be one of the most practical truck suspension upgrades available.

Compared with other modifications, air suspension systems offer several advantages:

✔ Adjustable support depending on load
✔ Better control of squatted trucks
✔ Improved ride comfort
✔ Reduced wear on factory suspension
✔ Increased towing safety

Because air pressure can be adjusted quickly, drivers can adapt their suspension to different loads.

This makes air bags for towing far more flexible than traditional suspension upgrades.

Signs Your Truck May Need Suspension Upgrades

If you frequently tow heavy loads, you may notice signs that your factory suspension needs help.

Common symptoms include:

• A persistent squatted truck stance

• Poor handling when towing

• Rear suspension sag under moderate loads

• Excessive trailer sway

• Uneven ride height

In these situations, installing air bags for towing or performing truck suspension upgrades can significantly improve towing performance.

Introducing the Upgraded RETRUE Air Suspension System

For drivers who tow regularly, a high-quality air suspension system makes a noticeable difference.

RETRUE recently introduced an upgraded air suspension kit designed specifically for towing stability and heavy load support.

This upgraded system includes:

• Reinforced heavy-duty air springs

• Improved air line durability

• Stronger mounting brackets

• Reliable pressure retention

• Complete installation hardware

The system is engineered to maintain consistent air bag pressure for towing, helping eliminate squatted trucks and improving ride balance.

Whether you tow a camper, boat, or equipment trailer, upgrading your suspension with RETRUE air bags for towing can dramatically improve stability and confidence on the road.

FAQ – Air Bag Pressure for Towing

What PSI should air bags be when towing?

Most towing setups operate between 30 and 60 PSI, depending on trailer weight.

What is the minimum PSI for air bags?

Most air bag suspension systems require at least 5 PSI to maintain proper shape and prevent damage.

Can too much air bag pressure cause problems?

Yes. Excessive pressure can create a stiff ride and reduce traction.

Do air bags stop squatted trucks?

Yes. Properly adjusted air bags for towing are one of the most effective ways to eliminate squatted trucks and restore a level ride height.

Final Thoughts

Understanding the correct air bag pressure for towing is essential for safe and comfortable hauling.

By properly adjusting truck air bag PSI, drivers can eliminate squatted trucks, improve towing stability, and extend the life of their suspension components.

For drivers who tow frequently, installing air bags for towing is one of the smartest truck suspension upgrades available today.