The Virtual Pivot Point (VPP) and DW-Link are two relatively new suspension designs on the market. They both offer great benefits in ride quality over other, simpler designs but also have a few downfalls that will be discussed.
The two designs look very similar to one another, but are in fact quite different. Both designs use two links which connect the front and rear triangles of the bike. This allows the rear wheel to move independently of the frame in a close to vertical wheel path. The differences come in the way the links are positioned. Looking closely at the linkage as the bike moves through its travel you will notice that the two links move in the same direction on a DW-Link while they are opposite on a VPP design. What this results in is a progressive vs. regressive leverage ratio. In english, a progressive ratio means that the further into the travel you are the harder it will be to further compress the shock. On the contrary, a regressive ratio will get easier to compress as you move through the travel.
Have a look at the two designs, they look similar, but are distinctly different.
See the latest posts at norco.wordpress.comDustan
VPP - Regressive Ratio
DW-Link - Progressive Ratio
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