DHX2 Progressive Damping Ready To Race Nothing sticks to the ground quite like a coil shock. The DHX2 takes this trait and multiplies the sensation with sophisticated progressive damping, a new chassis and damper design and a new ultra-low friction, highly durable hard chrome damper shaft. With a massive overall tuning range the all new DHX2 series shocks take the magic carpet experience to the next level. Factory Series Fox factory products are packed with features and materials developed and used by elite factory sponsored riders. Fox factory shocks are what they race.