Full vs Semi Air Suspension: What’s the Difference?

Upgrading your vehicle’s suspension can transform the way it handles, feels, and performs. But if you’ve started looking into the options, you’ll soon find two main choices: full air suspension and semi air suspension.

Both offer impressive improvements over standard springs, but they work differently, suit different needs, and come at different price points. Here’s everything you need to know before deciding which is right for you.

Written By David Cunningham | Sales Director

How Air Suspension Works

Air suspension replaces or supports traditional springs with flexible air bags (or air springs) filled with compressed air. An onboard compressor and valve system adjust the air pressure to change the ride height, improve stability, or maintain a level stance under load.

The idea is simple: air is more adaptable than steel. By adjusting the pressure, you can fine-tune your vehicle’s suspension for comfort, handling, and load capacity, all without changing any mechanical parts.

What Is Semi Air Suspension?

Semi air suspension works alongside your vehicle’s existing suspension, most often supporting the rear axle. Air bags are installed between the chassis and axle, and these can be inflated or deflated to change the ride height and firmness.

It’s a popular option for drivers who regularly carry heavy loads, tow trailers, or deal with uneven weight distribution, but who don’t need a full replacement system.

Reduces rear-end sag when carrying heavy loads
Improves stability when towing or transporting equipment
Helps balance uneven loads for smoother, safer handling
Adjustable using manual valves or in-cab controls
More affordable and quicker to install than full air suspension

What Is Full Air Suspension?

Full air suspension replaces the vehicle’s existing springs with air springs. This system is managed by an advanced electronic control unit that can adjust pressure automatically based on load, road surface, and driving style.

The result is a ride that’s smoother, more controlled, and consistent, even when the vehicle is heavily loaded or driving over uneven terrain.

Maintains a consistent ride height regardless of load
Automatically levels the vehicle for maximum stability
Adjustable for different terrains, from motorways to rough tracks
Significantly improves ride comfort and handling
Ideal for ambulances, patient transport, and specialist commercial vehicles where safety and passenger comfort are critical

Common Applications

Air suspension systems are used across a wide range of vehicles.

Semi Air Suspension is often fitted to:

Motorhomes and campervans – for stability, comfort, and rear load management
Commercial vans – for improved handling and reduced wear on components
Horseboxes – to protect animals during transport with a smoother ride
Wheelchair-accessible vehicles – for easier loading and a more comfortable journey
Recovery and utility vehicles – for better performance under heavy loads

Full Air Suspension is often fitted to:

Side-by-Side Comparison

Feature	Semi Air Suspension	Full Air Suspension
Works with original suspension?	Yes	No – fully replaces it
Adjustability	Manual or basic electronic	Fully automatic, advanced controls
Cost	Lower	Higher
Comfort & control	Improved	Significantly improved
Installation time	Quicker	Longer, more complex
Best for	Motorhomes, campervans, vans, horseboxes, WAVs	Ambulances, patient transport, specialist commercial vehicles
Maintenance	Minimal	Requires occasional system checks

Which Option Should You Choose?

There’s no one-size-fits-all answer, but asking yourself these questions can help:

What’s my typical load? If you only carry heavy loads occasionally, semi air suspension is often enough. Specialist vehicles in constant heavy use may require full air.
What type of vehicle do I have? Semi air suspension is the ideal upgrade for motorhomes, campervans, vans, horseboxes, and wheelchair-accessible vehicles, giving noticeable improvements in ride quality, handling, and load management. Full air suspension is suited to ambulances and other specialist vehicles, where automatic levelling and consistent ride height are critical.
Do I need automatic levelling? For most road users, semi air suspension delivers all the comfort and control required. For vehicles that must maintain a perfectly level stance at all times, such as ambulances and patient transport, full air suspension is the solution.

In short:

Choose semi air suspension if you want a proven, cost-effective upgrade that improves stability, comfort, and load support on motorhomes, vans, campervans, horseboxes, or WAVs.
Choose full air suspension if you operate ambulances, patient transport, or specialist commercial vehicles where automatic levelling and maximum stability are essential.

Why Choose Glide-Rite?

With decades of experience in air suspension design, supply, and installation, Glide-Rite is trusted by drivers across the UK for:

Chassis-specific solutions – tailored to your exact make and model
Expert installation – carried out by trained specialists
Long-term reliability – with strong warranties and aftercare support
Proven track record – working across motorhomes, commercial fleets, and specialist vehicles

Our goal is to help you choose the right suspension system for your needs, ensuring you get the most from your investment.

Ready to Upgrade Your Suspension?

Get In Touch

Choosing between full and semi air suspension is easier with expert advice. Our team can assess your vehicle, talk you through the options, and recommend the perfect setup for your needs.

Speak to a specialist today.

What Our Customers Say

    
 
 
       Posted on Google  
    Andrew Pritchard 
 
 
 
 Trustindex verifies that the original source of the review is Google. A very happy customer having just had rear air assist fitted to our Le Voyageur motorhome, by the team at Glide Rite. From the initial contact with David, all through the booking process and then on the day of fitting this week, everything was professionally handled.
Much appreciated was the ability to park outside overnight, complete with hook up, security lights and CCTV, and then the generous use of a courtesy car whilst my installation was done. A great job, and glad to have decided on the day to upgrade to the Air Master Controller, looks great in our Mercedes cab 😁
  
 
      Posted on Google  
    bikerarthur27 
 
 
 
 Trustindex verifies that the original source of the review is Google. The whole process of adding semi air suspension from start to finish was completely stress free; cannot recommend this company highly enough. Was able to stop overnight as had travelled along distance from the Midlands, 3 hours journey. Electric hook up available which was great as the temperature went down to freezing overnight.
  
 
      Posted on Google  
    Peter Clifford 
 
 
 
 Trustindex verifies that the original source of the review is Google. Had air suspension fitted to my Bailey Adamo and very impressed with the system. Extremely impressed by the level of service and support, communication and general ethos of the company. Highly recommended.
  
 
      Posted on Google  
    Sally Chatting 
 
 
 
 Trustindex verifies that the original source of the review is Google. What can I say.... cannot fault the excellent product - semi air suspension and upgraded front springs on Rapido 8096DF....rides like a dream and levels her out a treat. More to the point, David and Carl are the business.... professional, helpful and friendly and couldn't do more. We stayed outside the night before, free electric hook up, free use of courtesy car and a lift to and from the ferry for our sightseeing in Liverpool whilst they completed the work.
Top of our list for any future work. Give them a go, you will not regret it! Thanks team Glide Rite!
  
 
      Posted on Google  
    jefferson lord (skycamuk) 
 
 
 
 Trustindex verifies that the original source of the review is Google. Fantastic company,  they fitted rear air suspension to my adamo 75-4DL.   No fuss no drama , great price and completed in the day
  
 
      Posted on Google  
    Abelard Snazz 
 
 
 
 Trustindex verifies that the original source of the review is Google. This company is one of the best I've ever had the pleasure of dealing with all the staff are courteous, knowledgeable and can't do enough to help you. I had the semi air suspension fitted and what a difference it made, it should be mandatory on any camper conversion. The van now handles like it should instead of trying to steer a brick. A big thank you to all the team at glide-rite. John.
  
 
      Posted on Google  
    Tina Malone 
 
 
 
 Trustindex verifies that the original source of the review is Google. From the first contact with Glide-Rite their professionalism was apparent. David and Carl were both extremely helpful and friendly, even giving us a lift to the train station.
We had semi-air suspension fitted to our 2008 Hymer A class motor home and new front springs. The difference this made to the drive and stability of the vehicle was incredible. First class professional workmanship, so glad we had this job done many thanks to Dave and Carl at Glide-Rite. Excellent service, definitely recommend this company.
  
 
      Posted on Google  
    Chris Bruney 
 
 
 
 Trustindex verifies that the original source of the review is Google. Edit Nov 2025
I wanted to leave this follow-up review for Carl, David, Alan and the team at Glide-Rite.

After having a levelling system fitted almost 18 months ago and then my semi-air suspension 6 months ago, we took our motorhome on an epic journey across Europe, fully laden with everything you need for a long trip (including a motorcycle).

Both systems were transformational and gave us speed and comfort on almost every kind of terrain – incredible investments that massively enhanced our experience.

While the initial installations were flawless, what truly amazed me was the after-sales service. I had an issue – most likely my mistake – and Carl had also promised a component upgrade last year. It would have been so easy to fob me off, but even after 18 months he treated me no differently to the first time we met: as a valued customer. I’m just staggered!

Today they spent almost three hours completing the work and made me comfortable in their office while I waited. The work was completed to a very high standard, and they even replaced a component I had damaged – all free of charge.

So when you’re shopping around for cheaper prices, please remember: there are still companies in the UK that remember what proper customer service looks like – Glide-Rite is at the top of the list!

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Outstanding customer service end-to-end!

From the very first enquiry of our HPC Self Levelling System, to the chauffeur collection at the train station after fitting, this team have been simply amazing. First class, secure facilities and top-notch workmanship where attention to detail is unrivalled.

Really happy to recommend Carl, David, Alan and will definitely be back for the air suspension in the future!
  
 
      Posted on Google  
    David Ward 
 
 
 
 Trustindex verifies that the original source of the review is Google. I can honestly say say that there aren’t many companies nowadays that offer the high level of customer service and satisfaction that Glide Rite do. We travelled from Yorkshire to have rear air suspension fitted and was really impressed with our experience! We were allowed to park up our motor home with free electric hook up and stay over night as our job was booked in for the next day. On top of this we were offered the use of a practically new courtesy car with a full tank of fuel to spend the day site seeing around Liverpool.  Carl is the nicest and most professional man and he made us feel so valued. 💯% prefect thank you so much 👍🏼 would highly recommend to anyone
  
 
      Posted on Google  
    Richard Cooper 
 
 
 
 Trustindex verifies that the original source of the review is Google. Excellent customer service from start to finish. We had semi air suspension and hydraulic levelling fitted. Extremely pleased with the professional job and the difference it has made to the ride. Thank you David and the team. Would highly recommend 👌
Best regards Richard

Advice, options, price, fitting service and communication were excellent. These people could not be more helpful and they will get my business again without question. I would recommend them to friends and family.

Glide-Rite carried out the annual hydraulics check/service and the installation of an air suspension assist system on our motorhome earlier this year. As always, the work was done to the high standard I have come to expect, and in an agreeably timely manner. This company is easy to deal with, and I commend their products, personnel and level of service to all who have need of these.

Excellent company with fantastic service. The air suspension and hydraulics installed on my vehicle have been tremendous. Carl, David and the team are experienced professionals who are so easy to get along with. Couldn’t ask for a better service.