Power Spring with safety against overstretching
Ultra Pulley: kugelgelagerte Umlenkrolle
The Suspension Upgrade contains the Power Spring and the Ultra Pulley and allows for a sling training with maximum instability. The ball bearing Ultra Pulley runs incredibly smooth and demands a great amount of coordination from trainees. The Power Spring adds a new dimension of instability to one part of the exercises, for the other part it absorbs peak loads to make the training more joint-friendly. If you want to get the maximun out of your aeroSling ELITE you should take a closer look at the Suspension Upgrade.