Air Suspension for Heavier Loads

It's a common quandary for motorhome owners: the joy of packing up and heading off on an adventure is often tempered by the realisation that the vehicle's suspension is groaning under the weight of all your gear. You might be asking yourself, "Does my suspension suffer under payload, and if so, do I need a semi-air system to rectify this?" This article aims to demystify air suspension assist systems and explore how they can significantly improve your motorhome's handling and comfort when carrying a heavy load.

Understanding Your Motorhome's Suspension

A motorhome's suspension system is designed to absorb shocks from the road and maintain contact between the wheels and the surface, ensuring stability and a comfortable ride. However, standard leaf spring or coil spring systems can be pushed beyond their optimal operating limits when subjected to significant additional weight, such as that from a fully loaded motorhome, including water tanks, fuel, passengers, and all your camping essentials. When this happens, you might notice symptoms like:

• Excessive sagging: The rear of the motorhome visibly drops when loaded.
• Bouncing and instability: The vehicle feels less planted on the road, especially when cornering or encountering uneven surfaces.
• Bottoming out: The suspension hits its bump stops, leading to a jarring impact.
• Poor handling: Steering can feel vague, and the vehicle may be more susceptible to crosswinds.
• Increased tyre wear: Uneven weight distribution can lead to premature and uneven wear on your tyres.

What is a Semi-Air Suspension Assist System?

A semi-air or air suspension assist system is not a complete replacement for your existing suspension but rather a supplementary system designed to enhance its capabilities. Typically, these systems involve fitting air helper springs, often in the form of bellows or air bags, alongside or in place of the existing bump stops. These air springs are connected via air lines to a compressor and a control unit, allowing the driver to adjust the air pressure within the springs. By increasing the air pressure, you effectively stiffen and raise the suspension, providing additional support to counteract the effects of a heavy payload.

Benefits of an Air Suspension Assist System

The advantages of installing an air suspension assist system on a motorhome that struggles under load are numerous and significant:

Improved Ride Comfort

By allowing you to fine-tune the air pressure, you can tailor the suspension to the specific load you are carrying. This means a more cushioned ride, absorbing road imperfections more effectively and reducing the jarring impacts associated with bottoming out. The result is a significantly more comfortable experience for both driver and passengers, even on longer journeys.

Enhanced Stability and Handling

When your motorhome is overloaded, its centre of gravity can be compromised, leading to a feeling of instability. Air suspension assist systems help to level the vehicle, reducing body roll during cornering and improving overall stability. This makes the motorhome feel more predictable and secure on the road, giving you greater confidence when driving.

Load Levelling Capabilities

One of the most immediate benefits is the ability to counteract the sagging caused by a heavy rear-end load. By inflating the air springs, you can lift the rear of the motorhome back to its original ride height. This not only improves the vehicle's aesthetics but, more importantly, restores its intended geometry, leading to better weight distribution and improved handling.

Protection for Existing Suspension Components

When your standard suspension is constantly overloaded, it puts undue stress on components like leaf springs, shock absorbers, and chassis. By providing additional support, an air suspension assist system can help to reduce the strain on these parts, potentially extending their lifespan and preventing costly repairs.

Adjustability for Varying Loads

The beauty of an air suspension assist system lies in its adjustability. Whether you're lightly loaded for a weekend trip or fully packed for an extended tour, you can adjust the air pressure to suit. This flexibility ensures optimal performance and comfort regardless of your payload.

When is an Air Suspension Assist System Recommended?

If you've experienced any of the symptoms of an overloaded suspension mentioned earlier, an air suspension assist system is definitely worth considering. It's particularly beneficial for:

• Motorhomes that are regularly loaded to or near their maximum Gross Vehicle Weight (GVW).
• Owners who frequently carry heavy items such as motorcycles, scooters, or large amounts of water.
• Those who tow a trailer or another vehicle behind their motorhome, as this adds significant tongue weight.
• Drivers who desire a more comfortable and stable driving experience, especially when carrying a full load.

Installation and Maintenance

As highlighted by the positive experience with Glide-Rite, professional installation is key to ensuring your air suspension assist system functions correctly and safely. Reputable companies will use high-quality components and ensure the system is integrated seamlessly with your existing suspension. Regular checks, similar to the annual hydraulics check mentioned, are advisable to ensure the air lines are secure, there are no leaks, and the compressor is functioning optimally. Most systems come with an in-cab control, often a small gauge and switch, allowing for easy pressure adjustment.

Semi-Air vs. Full Air Suspension

It's important to distinguish between a semi-air assist system and a full air suspension system. A full air suspension system replaces the vehicle's original springs entirely with air bellows, offering a much greater degree of adjustability and a more pronounced change in ride quality. A semi-air assist system, on the other hand, works in conjunction with your existing springs, providing supplemental support. For most motorhomes experiencing payload issues, a semi-air assist system offers an effective and often more cost-efficient solution.

Comparison Table: Semi-Air Assist vs. Standard Suspension

Frequently Asked Questions

Q1: Will an air suspension assist system completely eliminate body roll?

While it significantly reduces body roll, it won't eliminate it entirely, especially in heavier vehicles. However, the improvement in stability is substantial.

Q2: Can I install an air suspension assist system myself?

While DIY installation is possible for those with mechanical experience, it's generally recommended to have it professionally installed to ensure safety, proper function, and to maintain any vehicle warranties.

Q3: How much does a semi-air suspension assist system cost?

Costs can vary depending on the make and model of your motorhome and the specific kit used. However, expect to invest several hundred pounds for a quality system and professional installation.

Q4: Will this system increase my motorhome's legal payload capacity?

No, an air suspension assist system improves how the vehicle handles an existing load; it does not increase the legal Gross Vehicle Weight (GVW) or payload rating of your motorhome.

Q5: How often do I need to check the air pressure?

It's good practice to check the air pressure before significant journeys or when you've made substantial changes to your load. Regular checks, perhaps monthly, are recommended.

Conclusion

If your motorhome's suspension is noticeably suffering under payload, an air suspension assist system is a highly effective solution. It offers a tangible improvement in ride comfort, stability, and handling, making your travels more enjoyable and safer. The ability to adjust the system to your specific needs provides unparalleled flexibility. As evidenced by satisfied users who have had systems installed by specialists like Glide-Rite, investing in this upgrade can transform your motorhome experience, allowing you to carry your gear with confidence and enjoy a much smoother ride.

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