Wunderlich Suspension Shock Absorber S4 + HPA - Lowering by -25 mm - rear

Facts and product features of the Wunderlich Suspension powered by TracTive S4 HPA shock absorbers

High-performance shock absorber of the latest generation, designed as an upgrade or replacement for the standard suspension. Developed to meet the demanding requirements of discerning adventure riders who frequently go off-road, touring riders who regularly travel with heavy loads, as well as riders who seek additional safety reserves. Equipped with a PDS bottoming protection system and a hydraulic spring preload adjustment (HPA).

We individually select the spring rate of the spring according to your personal riding profile specifications.

• Damping characteristics
• Our shock absorbers are specifically developed for each vehicle and its intended use, offering high performance and impressive reserves.
• The well-balanced, sensitive damping response of our suspension components ensures neutral, predictable handling, supporting rider confidence and enhancing riding enjoyment.
• The shock absorbers stand out thanks to their excellent, transparent feedback; they optimise tyre-to-road contact, wheel guidance and tracking stability while reducing tyre wear.
• Individual damping adjustment: The high-quality shock absorber features high- and low-speed compression damping adjustment, meaning the compression damping can be tuned according to the speed of the compression process (i.e. the velocity of the damping piston movement).
• The rebound damping adjustment with 18 clicks allows for precise fine-tuning of the damping using the suspension tool.
• The shock absorber is equipped with the so-called PDS system, which reduces the risk of bottoming out and the resulting stress caused by hard impacts during demanding use.
• The PDS system, along with the wide range of rebound and compression adjustment options, meets the highest demands of adventure and touring riders. It noticeably improves comfort and safety and can help reduce stress on the frame.
• To achieve optimal, sensitive response:
  • The oil channels are generously dimensioned to minimise oil flow resistance,
  • We use large-diameter pistons (46 mm) to further reduce flow resistance,
  • And we use low-friction seals and special shim stacks.
• These closed shock absorbers are fitted with an external, forged aluminium reservoir that supports the system’s thermal stability and performance through optimal heat dissipation.
• The generously dimensioned oil volume and large cooling surface ensure:
  • Low and optimal operating temperature of the oil,
  • Stable damping performance at the highest level,
  • And extended service life of both the damper and the oil.

• Spring characteristics and preload
• Hydraulic spring preload: The shock absorber is equipped with a sealed, highly robust hydraulic spring preload adjustment. The preload can be conveniently adjusted via an easily accessible handwheel. The durable adjustment mechanism withstands the toughest conditions.
• The wide adjustment range compensates for a large variety of load conditions.

• Setup
• Special Wunderlich Suspension setup for adventure and touring riders who place high demands on their suspension.

• Customisation
• We individually select the spring rate of the spring according to your personal riding profile specifications: Once you have chosen your shock absorber, simply define your personal specifications during the ordering process – these form the basis for selecting the spring that perfectly matches you.

• Maintenance
• Every shock absorber can be fully and professionally serviced at the Wunderlich Suspension Centre.
• The suspension tool is included in the scope of delivery.

Technical data

• Material
  • The shock absorber housings are precisely manufactured from high-quality aluminium.
• Special features
  • PDS system – reduces the risk of bottoming out
  • Closed system
• Build quality
  • We use only high-strength components such as micro-machined, inductively hardened and tempered 42CrMo piston rods, premium-quality bearings, stainless steel bushings, and low-friction seals.
• Dimensions
  • Piston diameter: 46 mm
  • Piston rod diameter: 16 mm
• Spring preload adjustment
  • Hydraulic with handwheel (HPA)
• Installation position
  • Rear swing arm

Your Wunderlich advantages

• Wunderlich product. Small series. Handmade.
• Wunderlich design. Functional and integrated.
• Tested by Wunderlich.
• Made in Europe.
• 5-year warranty with adherence to 24-month maintenance intervals.
• with German type approval