S4 Custom Tuning

S4 Suspension knows how to tune, adjust and upgrade your suspensions. If you are a racer or a mountain bike addict, we can improve your riding different ways.

  • Changing rebound valving
  • Changing compression valving
  • Changing the piston ports
  • Custom made parts
  • Install 1 way piston bolt to avoid oil flow crossing
  • Changing the volume of the air chamber