Progressive Suspension® 512-1023B - 512 Series Shock Absorber

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Vehicle Fitment

HondaTRX350 FourTrax Rancher 2000-2006

Product Details

512 Series Shock Absorber by Progressive Suspension®. Quantity: 1 per Pack. The 512 Series was the first aftermarket shock made specifically for Utility ATV's. They have undergone extensive R&D to provide the finest possible suspension for your workhorse vehicle. Progressive Suspension use improved spring rates for heavier load stability and handling over rough terrain as well as increased length for more travel and ground clearance. The 512 Series comes with an adjustable spring preload to accommodate different loads (i.e. mounting a plow or carrying a hay bale). Also included is Progressive Suspension Shock "Sox" to help keep dirt and mud out of the spring and to keep the adjusters clean.


Compressed Length: 11.22" (284.90 mm)
Extended Length: 15.88" (403.35 mm)
Stroke Length: 4.66" (118.30 mm)
Lower Mounting: Eyelet
Upper Mounting: Eyelet
Spring No.: 1396-20B
Spring No.: 1407-20B
Spring Rate: 140/190 lbs/in
Spring Rate: 2.50/3.39 kg/mm


  • 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.

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Progressive Suspension® 512-1023B - 512 Series Shock Absorber

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