I've said here before that I know very little about the PDS system, so aside from marketing reasons I'm looking for somebody to convince me why it is necessary and why some class it as the future for suspension. The case for linkages: short shocks can be used making them lighter. the shock can be positioned close to the bikes centre of gravity. they can have infinately variable motion ratio's with respect to wheel travel. a linkage changes the rate of velocity as well as spring force. the shock compresses in a straight line with very little rocking motion. Is a complex link and simple shock the way forward or a complex shock and no link?