Originally Posted by JAJ
Ride comfort is a function of the damper curve, and the straighter it is, the harsher it is. That's why AST is making so much fuss about their hyper-digressive valving. That sharp bend in the curve delivers good motion control at the track and a comfortable ride on the drive home. JRZ, Penske, Koni, Bilstein, Sachs and so on can all deliver something similar, but it's a racing shock feature that most racers don't care about unless they're doing 12 and 24 hour endurance events. Most street shocks can't afford the technology to do this and still stay at the price points they're aimed at.
Are the AST shocks digressive on both rebound and compression? I read somewhere on the Internet that the JRZ RS1 is digressive on compression and linear on rebound. I'll try again to find the source.
Here is where I read it.