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.
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