Progressive Suspension® 444-4059B - 444 Series Shocks

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Product Details

444 Series Shocks by Progressive Suspension®. Finish: Black. Length: 11.5". Rate: Standard. 444 Series Shocks feature a proprietary patented Frequency Sensing Technology (FST) that has the unique ability to dynamically adjust damping as you ride; what this means is whether you're hitting the small or big bumps in the road, the shock distributes oil through ports accordingly to soak up the hit making for an ultimately comfortable ride. A top mount threaded preload adjuster allows for fine-tuning with a simple twist of the cap. Every 444 shock is hand-built, tuned and dyno'd in Progressive Suspension facility in La Palma, California and include a Lifetime Warranty


Extended Length: 11,5"
Complete Length: 247,14 mm
Travel: 44,96 mm
Mounts: E/E
Spring No.:03-1319-20B/30
Rate: 140/180 lbs/in
Rate: 2.50/3.21 kg/mm


  • Frequency Sensing Technology (FST) Allows the shocks to sense the frequency of a bump and automatically adjust damping for superior ride quality
  • Deflective disc valving
  • Adjust spring pre-load by hand, no special tool needed
  • Progressive rate spring
  • Standard or heavy duty spring rate and black or chrome finish
  • Lifetime Limited Warranty & made in USA
  • Engineered around your bike’s suspension needs
  • Cutting-edge technology for an ultimately comfortable ride
  • Superior grade materials for uncompromising reliability

Founded in 1982, Progressive Suspension® has evolved into the largest aftermarket motorcycle suspension manufacturer in the United States as well as a top tier supplier of suspension components to domestic OE customers. Their suspension systems can be found on premier customs, production trikes and just about any bike that's doing big miles across the US and for that matter the world. A team of ride control trained engineers use state of the art computers, shock dynos and real world testing to create the ideal suspension platform for your bike. From there, their state of the art manufacturing facility assembles and in many cases dyno tests each unit before it leaves the factory. Their quality control systems touch on each component from assembly to final stages and nothing gets in or out of the building without passing a rigorous inspection. High performance suspension is not limited to street machines, as their line up also includes an in depth line of shocks and fork springs for bikes dating back to the 50's as well as product for modern Adventure Touring bikes, Sport Bikes, ATV and UTV's.

Part Number:
Alternate MPN:
4444059B, 44-3559

Vehicle Fitment

Harley Davidson
CVO Road Glide 2009
CVO Road Glide Custom 2012-2013
CVO Road Glide Ultra 2011
CVO Road King 2013
CVO Street Glide 2010-2012
CVO Ultra Classic Electra Glide 2009-2013
Electra Glide Classic 2006-2013
Electra Glide Standard 2006-2009
Electra Glide Ultra Classic 2006-2013
Electra Glide Ultra Limited 2010-2013
FLHP Road King Police 2008-2013
FLHTP Electra Glide Police 2006-2013
Road Glide 2006-2009
Road Glide Custom 2010-2013
Road Glide Ultra 2011-2013
Road King 2006-2013
Road King Classic 2006-2013
Road King Custom 2006-2007
Screamin Eagle Road King 2007-2008
Screamin Eagle Ultra Classic Electra Glide 2006-2008
Street Glide 2006-2013
Street Glide Trike 2010-2011
Tri Glide Ultra 2013
Tri Glide Ultra Classic 2009-2013


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Progressive Suspension® 444-4059B - 444 Series Shocks

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