Wunderlich Suspension Shock absorberS4 PRO + HPA (Low -20mm) - Low -20mm - rear

Facts and Product Features of Wunderlich Suspension powered by TracTive S4 PRO HPA Shock Absorbers

For extreme use: The PRO version. Extra-reinforced high-performance shock absorber of the latest generation as an upgrade or replacement for the stock suspension. Designed for the highest demands of demanding adventure riders who frequently go off-road and touring riders who regularly travel with heavy loads, as well as for riders who desire extra safety reserves. Equipped with the PDS bump stop system and hydraulic spring preload (HPA).

We select the spring rate of the shock absorber based on your personal riding profile specifications.

• Damping Characteristics
• Our shock absorbers are specifically developed for each vehicle and application, offering high performance and impressive reserves
• The balanced, sensitive damping behavior of our suspension components ensures a neutral, predictable handling, and supports confidence in your own motorcycle, enhancing personal riding enjoyment
• The shock absorbers excel at providing excellent feedback, improving tire-road interaction, wheel control, and track accuracy, while reducing tire wear
• Individual damping adjustment: The high-quality shock absorber features high and low-speed compression damping adjustment, allowing you to adjust compression damping based on the speed of the compression stroke (i.e., the speed at which the damping piston moves during the stroke)
• The rebound damping adjustment with 18 clicks allows fine-tuning of the damping using the suspension tool
• The shock absorber is equipped with a PDS system, which reduces the risk of bottoming out and the associated stress from hard hits during demanding use
• The PDS system, along with extensive options for individual adjustment of rebound and compression damping, meets the highest demands of adventure and touring riders. They significantly enhance comfort and safety and can help reduce frame stress
• To achieve optimal, sensitive responsiveness,
  • the oil channels are generously sized to minimize oil flow resistance
  • we use pistons with a large diameter (46 mm)
  • as well as low-friction seals and special shim stacks
• These sealed shock absorbers feature an external forged aluminum reservoir, supporting thermal stability and system performance through optimal heat dissipation
• The generous oil volume and large cooling surface
  • ensure a low, optimal oil operating temperature,
  • resulting not only in stable performance at the highest level,
  • but also in extended shock absorber and oil life

• Spring Characteristics and Preload
• Hydraulic spring preload: The shock absorber is equipped with an encapsulated, highly robust hydraulically operated spring preload adjustment. The preload is adjusted - very conveniently - with an easily accessible handwheel. The robust preload adjustment device withstands the toughest conditions
• The generous adjustment range can compensate for a wide range of load conditions

• PRO
• The PRO shock absorbers are the best shock absorbers for extreme use. They are even more robustly constructed, and their responsiveness is optimized due to the selected components and low-friction seals. The following features distinguish the PRO shock absorbers:
  • Shock absorber body made of aluminum
  • Stainless steel bearing bushes
  • Special low-friction seals with additional backup ring

• Tuning
• Special Wunderlich Suspension tuning for adventure and touring riders with high demands on their suspension

• Customization
• We select the spring rate based on your personal riding profile specifications: After choosing your shock absorber, simply determine your personal specifications during the order process – they serve as the basis for selecting the right spring for you

• Maintenance
• Each shock absorber can be professionally serviced at the Wunderlich Suspension Center
• The suspension tool is included in the scope of delivery

Technical Specifications

• Material
  • The shock absorber housings are precisely crafted from high-quality aluminum
• Special Features
  • PRO Specifications
  • PDS system – reduces the risk of bottoming out
  • Closed system
• Processing Quality
  • We use only highly durable components such as micro-machined, inductively hardened, heat-treated 42CrMo piston rods, high-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)
• Mounting Location
  • Rear swingarm

Your Wunderlich Advantages

• Wunderlich product. Small series. Handcrafted.
• Wunderlich design. Functional and integrated.
• Tested by Wunderlich
• Made in Europe
• 5-year warranty when maintenance intervals are followed for 24 months

Without ABE, comes with German firmness certificate for individuel approval by TÜV, Dekra or similar.