Christian Bagg: You’re right – a lot of people have tried to make suspension work, with varying degrees of success. We’ve hit it on a new level, using some existing bicycle technology, and applying it to the wheelchair scenario in a unique way. We took a DT Swiss shock (and more recently a an X-Fusion Shock), which is the top shelf of bicycle shock technology, and fit it to our wheelchair geometry just right – it has adjustable damp and rebound, as well as being fully adjustable for rider weight. This set of configurable elements is a first in the wheelchair world. We also suspend the seat, not the wheels and frame – a big problem with suspension in the past has been that as the suspension engages, the front castors are pulled out of alignment, so as soon as the user sits in the chair, the geometry of the front wheels is out. The other thing that we made sure of is that the suspension doesn’t add any weight to the chair.

Jeff Adams: And we added a torsion bushing to provide independent front suspension. This dampens vibrations, keeps all four wheels grounded except in the craziest of terrain, and makes the chair “bomb-proof”. There is a great video clip of our chair in our test lab that illustrates the independent front and rear suspension: