Wunderlich Suspension S4 + HPA Shock Absorber - standard - rear

Facts and Product Features of 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 high demands of discerning adventure riders who frequently ride off-road, touring riders who regularly travel with heavy loads, and those seeking additional safety reserves. Equipped with PDS anti-bottoming system and hydraulic spring preload adjustment (HPA).

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

• Damping characteristics
• Our shock absorbers are specifically developed for each motorcycle and intended use, offering high performance and impressive reserves
• The balanced and sensitive damping behaviour of our suspension components ensures neutral, predictable handling, enhances rider confidence and increases riding enjoyment
• The shock absorbers stand out for their excellent, transparent feedback: they optimise tyre-to-road contact, wheel control and directional stability while reducing tyre wear
• Individual damping adjustment: this high-quality shock absorber features both high- and low-speed compression adjustment, meaning that the compression damping can be fine-tuned depending on the compression stroke speed (i.e. the speed at which the damping piston moves during the process)
• The rebound adjustment with 18 clicks allows for precise fine-tuning of the damping using the included suspension tool
• The shock absorber is equipped with a PDS (Progressive Damping System), which reduces the risk of bottoming out and the associated stress from hard impacts during demanding use
• The PDS system and the extensive options for individual rebound and compression adjustment meet the highest demands of adventure and touring riders. They noticeably increase comfort and safety and can also help reduce stress on the frame
• To achieve optimal, sensitive responsiveness,
  • the oil channels are generously dimensioned to minimise oil flow resistance
  • we use large-diameter pistons (46 mm)
  • as well as low-friction seals and special shim stacks
• These closed shock absorbers feature an external, forged aluminium reservoir that enhances the system’s thermal stability and performance through optimal heat dissipation
• The generous oil volume and large cooling surface ensure
  • a low, optimal operating temperature of the oil,
  • which not only provides stable performance at the highest level,
  • but also ensures a longer service life of both the damper and the oil

• Spring characteristics and preload
• Hydraulic preload: the shock absorber is equipped with a sealed, extremely robust hydraulic spring preload adjustment. The preload is adjusted conveniently via an easily accessible handwheel. The solid adjustment unit is designed to withstand the toughest conditions.
• The wide adjustment range compensates for a broad spectrum of load conditions

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

• Customisation
• We individually select the spring rate according to your personal riding profile specifications: after choosing your shock absorber, simply specify your personal parameters during the ordering process – these form the basis for selecting the spring best suited to you

• Maintenance
• Each 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 machined from high-quality aluminium
• Special features
  • PDS system – reduces the risk of bottoming out
  • Closed system
• Manufacturing quality
  • We use only high-strength components such as micro-machined, induction-hardened, tempered 42CrMo piston rods, premium bearings, stainless steel bushings and low-friction seals
• Dimensions
  • Piston diameter: 46 mm
  • Piston rod diameter: 16 mm
• Preload adjustment
  • Hydraulic with handwheel (HPA)
• Installation location
  • Rear swing arm

Your Wunderlich advantages

• Wunderlich product. Small series. Handcrafted.
• Wunderlich design. Functional and integrated.
• Tested by Wunderlich
• Made in Europe
• 5-year warranty when 24-month maintenance intervals are observed
• with German type approval