This product has been discontinued

Progressive Suspension 440 Series Shocks


  • Manufacturer: Progressive Suspension


Progressive Suspension 440 Series Standard and Heavy-Duty I.A.S. Shocks
  • 440 Series Inertia Shocks from Progressive Suspension
  • Patented Inertia Sensitive damping System (IAS)
  • 2 independent rebound damping circuits, Soft (wheel) and Firm (chassis) circuits
  • Chrome billet aluminum end covers
  • Easy adjustable spring pre-load, no tools required
  • Polyurethane bushings
  • Powder coat finish on the body
  • Black Nitride coated shock shaft, harder than chrome, impervious to rust and corrosion
  • Limited lifetime manufacturer's warranty on shock and springs
  • Heavy Duty applications (HD) are recommended for bikes that are operated at or near the manufacturer's maximum load rating over 50% of the time.