Progressive Suspension® 412-4004C - 412 Series Shocks

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Product Details

412 Series Shocks by Progressive Suspension®. Finish: Chrome. Style: Heavy Duty. Length: 14.25". Rate: 1.61/2.32 kg/mm. The 412 Series shocks are simply the best value shock on the market today. The 412s simple, durable design means they will be an improvement to your motorcycles suspension performance for as long as you are riding it. The doublewall steel body construction with nitrogen charged, multi-staged velocity sensitive valving gives you smooth, consistent damping. A five-position cam style preload adjuster lets you dial in your ride whether youre a light rider or heavy hitter. With multiple options like full show chrome or black covers, chrome or black springs in progressive rate, Standard or Heavy-Duty for most applications, there is sure to be a 412 thats right for you and your bike.


  • Heavy Duty Applications are recommended for riders that are 250lbs or more or for riders who ride 2 up over 50% of the time
  • Before purchasing longer than stock shocks, confirm that your wheel travel can be extended without causing clearance issues such as, swingarm/axle to exhaust contact as well as chain/belt guard contact


Extended Length: 14"
Extended Length: 362 mm
Complete Length: 10"
Complete Length: 263 mm
Travel: 4"
Travel: 87 mm
Mounts: E/E
Rate: 90/130 lbs/in
Rate: 1.61/2.32 kg/mm
Spring No.: 03-1367B/C
Preload Type: 5-position Cam style
Damping Type: Multi stage velocity sensitive valving


  • All Steel double wall damper with multistage velocity sensitive damping
  • 5-position cam style preload adjuster
  • High Pressure Gas Charged for consistant damping performance
  • Standard or Heavy-Duty progressive rate springs in either chrome or black
  • Optional full Show Chrome covers on select applications
  • 1 Year Warranty
  • 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:
4124004C, 44-4004

Vehicle Fitment

Harley Davidson
Cafe Racer 1977-1978
Low Glide 1982-1992
Low Rider Custom 1987-1994
Low Rider Sport 1987-1993
Sport Glide 1983-1992
Sportster 1200 Custom 1995-2003
Sportster 1200 Sport 1996-2003
Sportster 883 Custom 1999-2003
Sportster 883 Deluxe 1986-1987, 1992-1995
Sportster 883 Hugger 1987-2003
Sportster 883 Roadster 2002-2003
Super Glide II 1982-1983, 1986-1994
XLH1200 1988-2003
XLH883 1986-2003
XR1000 1983-1984


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Progressive Suspension® 412-4004C - 412 Series Shocks

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