
Box
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Inside the kit
4000KG - Rubena 170x3
For the specified vehicle application.
Hardware for assembling and securing the kit components.
16 metres in total.
12 metres in total.
3 in total when the compressor option is selected.
2 inflation valves and 2 pressure gauges for independent adjustment.
For securing the airline and conduit along their routing.
Step-by-step guidance for fitting your kit.
Included only when you choose a kit with a compressor.
Onboard air supply for inflating the air springs.
Electrical connections for the compressor system.
3 T-joints in total.
Helps keep dust and debris out of the compressor intake.
Help prevent air flowing back through the compressor connections.
Your controls. Your preferred position.

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Vehicle weight uprating
Conversions, extra equipment and everyday essentials all add weight. Vehicle uprating, also known as up-plating, may increase the permitted maximum loaded weight of an eligible vehicle, giving you more usable payload within its approved limits.
Fitting semi-air suspension does not automatically increase your vehicle’s legal weight limits. Confirm eligibility and any required upgrades with a suitably qualified uprating specialist before purchasing a kit for this purpose.
Uprating changes the approved maximum weight, not the vehicle’s actual weight. Weigh your vehicle in its normal travelling condition, including each axle, to understand your remaining payload.
Semi-air suspension adds support to the original rear suspension and helps reduce sag under load. An uprating assessment will determine whether suspension upgrades are required and whether the chosen kit is suitable.
Have your vehicle details, weight plate photograph, axle weights and tyre specifications ready. An assessor can confirm eligibility, any necessary changes and the documentation required before you proceed.
Independent uprating advice
This guidance focuses on motorhomes and other leisure vehicles. SvTech assesses vehicles individually and can advise on eligibility, suitable suspension upgrades and the documentation needed.
For work vans, recovery trucks and other commercial vehicles, contact SvTech directly for advice specific to the vehicle and its use. Do not assume this kit will qualify your vehicle for an uprating.