thule hullavator proA kayak carrier with lift assist that takes 18 kg of the kayaks weight, so you can load and unload on your own. Thule Hullavator Pro combines a lift assist system with a stable kayak cradle, making solo loading and unloading far more manageable. Gas assisted struts do the heavy lifting for you, reducing the load by 18 kg. If your kayak weighs more than that, you simply guide the remaining weight up in a controlled way. The twin extension arms lower