Problem
Driving at the limit
Motorhomes are typically built on commercial vehicle chassis. The suspension systems provided by the manufacturer are designed for alternating between full load and empty conditions, and not for the continuous load of a motorhome body. Due to comfortable interior fittings and equipment, the difference between body weight and maximum payload is often quite small. As a result, the original suspension is under constant stress and wears out more quickly over time.
In addition, the high center of gravity of a motorhome leads to increased body roll and tilting tendencies, which also place additional strain on the chassis. The weakening of the suspension springs is a gradual process and already has a negative impact on driving safety, even if the reduced ride comfort is not immediately noticeable. Action is therefore required long before the vehicle visibly appears overloaded.
Objective
Optimized driving dynamics instead of “crate transport”
Safe and comfortable driving is very important in a motorhome, especially considering the many kilometers traveled. The original chassis suspension is designed for transporting payloads. However, since the average motorhome occupants do not want the same level of comfort as a load of crates, special Linnepe suspension systems can be used to ensure optimized driving dynamics.
All systems contribute, within their respective capabilities, to the highest possible level of driving safety and enhance the overall driving experience.
Rear axle solutions
Reinforcement for the rear axle
Large rear overhang, a rear garage, or a cargo carrier? The forces acting on the rear axle suspension of a motorhome are significant. Auxiliary air suspension provides a substantial increase in driving safety and comfort: in addition to the original rear axle suspension, an air bellows is installed between the axle and the vehicle frame. The pressure in the bellows can be adjusted to different load conditions.
With an auxiliary air suspension system, the rear ride height can be adjusted, front axle traction in front-wheel-drive vehicles is improved, the vehicle becomes less sensitive to crosswinds, and overall handling becomes more balanced and stable. In addition, it is possible to increase axle loads as well as the permissible total weight of many base vehicles. Linnepe offers two air suspension variants, ensuring the right system is available for every vehicle type:
AirLift Maxi: For leaf-sprung vehicles with single or twin rear wheels (dual-circuit system incl. compressor).
AirLift: For older vehicle types with single rear wheels (standard single-circuit system without compressor).
Auxiliary air suspension – our systems
AirLift Maxi, AirLift and payload upgrade
AirLift Maxi: Auxiliary air suspension for leaf-sprung motorhomes with single or twin rear wheels.
AirLift: Auxiliary air suspension for older leaf-sprung motorhomes with single rear wheels.
Payload upgrade: for vehicles with Euro chassis, MAN TGE / VW Crafter, Ford Transit, and Mercedes-Benz Sprinter.
The systems are suitable for the most common motorhome chassis, require no modifications to the chassis, and installation should be carried out by a qualified workshop.
Classic car special
Auxiliary air suspension for motorhomes with historic vehicle registration (H-plate)
For classic motorhomes based on Ducato / Peugeot / Citroën 280/290 up to 1994, the AirLift is suitable as period-correct accessory equipment. A payload upgrade is also possible without losing historic vehicle status. This preserves the vehicle’s original character while bringing driving stability and safety up to a modern standard.
Front axle solutions
Reinforcement for the front axle: CoilSpring & ProShock
Anyone taking a closer look at motorhomes will notice that vehicles built on commercial vehicle chassis are often lower at the front. This is not only the case for older vehicles—new vehicles also frequently have a slight nose-down stance from the factory. While this is hardly noticeable in a van, it becomes uncomfortable in a motorhome.
The factory-fitted coil springs are under increased preload due to the high weight of the body. On larger road irregularities, the steel springs quickly reach their limit, resulting in harsh impacts being transferred to the body and passengers. Naturally, the springs also fatigue much faster under this load. Over time, this negatively affects not only ride comfort but also driving safety.
For motorhomes based on Fiat Ducato, we offer two straightforward solutions: the Linnepe CoilSpring (reinforced coil spring) and the Linnepe ProShock (combination of CoilSpring and optimized shock absorber).
CoilSpring: Progressive characteristic at a glance
Depending on travel purposes, recreational vehicles are not always fully loaded, which is why our specialists have designed the CoilSpring with a progressive rate. The coil spring has an initial preload. This raises the front of the motorhome again, while remaining soft and comfortable when the vehicle is lightly loaded.
As compression increases, the spring resistance rises progressively and keeps the vehicle front end elevated. Special steel alloys ensure that the CoilSpring maintains its strength and flexibility over a long service life.
The CoilSpring at a glance:
* For motorhomes with Euro chassis (Ducato / Peugeot / Citroën)
* Increased ground clearance at the front axle
* Cost-effective coil spring solution
* Wear-free and maintenance-free
* Quick retrofit in a professional workshop
Premium solution
ProShock – perfect driving comfort
The shock absorber and spring combination has been specially designed for the front axle of motorhomes. This ready-to-install solution aims to significantly improve driving behavior and comfort, especially under varying road conditions and loads.
Thanks to innovative shock absorber technology combined with the progressive characteristics of our CoilSpring, this comfort strut is the ideal choice for motorhome owners who value optimal handling and a pleasant travel experience. Whether in crosswinds, corners, or on long-distance journeys – the Linnepe ProShock ensures you reach your destination safely and comfortably.
Based on our proven CoilSpring, the comfort strut was developed in cooperation with Bilstein for motorhomes based on the Fiat Ducato (or equivalent Euro chassis). It reduces driving noise, increases safety, and can be quickly replaced in a workshop thanks to pre-assembly (including top mount, bump stop, and dust protection).
In addition, the combination is suitable for payload upgrades on light chassis.
Do you have questions?
Expert advice & service
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Learn moreChassis technology for motorhomes
Frequently asked questions
The basic requirement for increased load is the installation of our additional air suspension. If not only the permissible total weight (GVW) but also the rear axle load is to be increased, a new wheel/tire combination with the appropriate load capacity may need to be installed. The load capacity of the tires and rims must be half of the intended axle load.
You can find more information about loading here: surcharge
If the motorhome's load exceeds 3.5 tonnes, a lot changes for the driver. The most important points are the required driving license, possible toll fees, speed limits and overtaking bans.In one counselor We have put together the most important information about the changes with a load of over 3500kg.
We offer additional load options for many leaf-sprung chassis by installing our additional air suspension. Under surcharge you will receive detailed information about this. You are also welcome to send your vehicle-specific inquiry Contact form place.
- Installing the additional air suspension:An additional air suspension is retrofitted to the rear axle and complements the standard suspension.
- Increasing the axle load:The additional air suspension supports the additional weight and thus enables the permissible rear axle load to be increased (when using suitable rims).
- Adjustment of the permissible total weight:Due to the higher axle load and the ability of the additional air suspension system to carry the increased weight, the permissible gross vehicle weight of the motorhome can be increased, e.g. B. in the Fiat Ducato up to 4,700 kg.
- Steps needed:An additional technical report and acceptance by the TÜV is required for the loading.
- The relevant documentation must be entered into the registration office.
- If it is necessary to increase the rear axle load beyond the standard level, tires and rims with a higher load capacity may also need to be installed.
- More payload:You can take more equipment with you, such as: E.g. bicycles, SUP boards, awnings or other accessories.
- Improved driving comfort:The additional air suspension can stabilize driving behavior, reduce rocking and make the vehicle quieter.
- Adjustable level:The additional air suspension makes it possible to adjust the vehicle level using a compressor to raise or lower the rear.
Since the rear axle can now be subjected to a higher load, both the rim and the tire must have the necessary load capacity. This must be verifiable. If there is no report from the rim manufacturer, a new wheel/tire combination with a suitable certificate must be installed.
The load capacity of the tires and rims must be half of the intended axle load.
An additional air suspension on the rear axle of the Fiat Ducato supports or relieves the existing leaf suspension. The driving behavior of the motorhome is optimized and becomes more safe and comfortable.
Our AirLift air suspension has been in production since the 1980s. If necessary, we can send you confirmation of the market launch of the air suspension.
You can find out more about loading up on classic motorhomes in our guide Guide to classic motorhomes
Basic requirementfor loading a Fiat Ducato or an identical vehicle with a Euro chassis (Heavy)At 4700 kg is the installation of our additional air suspension. Since the rear axle also needs to be increased in weight (to 2600kg) in this case, a new wheel/tire combination may also be necessary.
The load capacity of the tires and rims must be half of the intended axle load.
The total towing weight of the vehicle remains unaffected if the load is increased.
This may result in the trailer load being reduced due to the additional load.
Example:
Total train weight: 5500kg
Before loading: 3500kg + 2000kg = 5500kg
Towing vehicle: 3500kg
Trailer load: 2000kg:
Total train weight: 5500kg
After loading: 4090kg + 1410kg = 5500kg
Towing vehicle: 4090kg
Towing capacity: 1410kg
The D value of the trailer coupling must also be taken into account. The D value is the measure of the strength of the pulling device, which is calculated using a fixed formula. However, several factors play a role. You can find detailed information in our guide: Trailer hitch motorhome guide
The installation of an AirLift Maxi additional air suspension can be completed quickly by experienced fitters. Depending on the vehicle type, assembly, TÜV approval and instruction by the fitter can be completed in one working day. The vehicle owner then has to have the change entered in the vehicle documents at his registration office.
Installing these components involves a modification to the chassis. This must be assessed by an expert and must be registered.
The LINNEPE QuickLift hydraulics can compensate for inclinations of up to 4° and thus ensure that the vehicle stands securely and comfortably.
We recommend reducing the pressure in the additional air suspension to the minimum before using a lifting support system. Advantage: The vehicle is then lower and the supports have a larger effective stroke. This makes it possible to compensate for larger inclines.