Digressive Working Piston Assembly - The piston head design allows independent tuning of the compression and rebound damping forces to provide optimum ride comfort and performance without compromise. It features fewer parts than most conventional twin tube and so call "adjustable" shock designs. This simple, yet exceptional functional digressive design contributes to the extreme durability and long life of Bilstein Shock Absorbers.
 

 

 

The photo below dramatically illustrates the size difference between the working piston inside a Bilstein monotube shock and one found in a typical "twin tube" shock.

The Bilstein has a 228% larger surface than the average conventional twin tube piston offering greater sensitivity and superior vehicle control.

 
MONO TUBE VS. TWIN TUBE DESIGN
   
  More information on Twin vs.Mono  
   
       
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