page_title: Bicycle suspension
section_title: Horst link
hierarchical_section_title: Bicycle suspension / Rear suspension / Horst link
caption_attribution_description: English: Represents a MoutainBike frame geometry, featuring a FSR technology. Based on a Specialized Stumpjumper FSR bike (2004 model) Français&#160;: Représentation de la géométrie d'un cadre équipé du système FSR. Basé sur un VTT Specialized Stumpjumper FSR (modèle 2004)
context_page_description: Bicycle suspension is the system, or systems, used to suspend the rider and bicycle in order to insulate them from the roughness of the terrain. Bicycle suspension is used primarily on mountain bikes, but is also common on hybrid bicycles.
  Bicycle suspension can be implemented in a variety of ways, and any combination thereof:
  Front suspension
  Rear suspension
  Suspension seatpost
  Suspension saddle
  Suspension stem
  Suspension hub
  Bicycles with only front suspension are referred to as hardtail and bicycles with suspension in both the front and rear are referred to as dual or full suspension bikes. When a bicycle has no suspension it is called rigid. Bicycles with only rear suspension are uncommon although the Brompton folding bicycle is equipped with rear only suspension.
  Although a stiffer frame is usually preferable, no material is infinitely stiff and therefore any frame will exhibit some flexing. Bicycle designers intentionally make frames in such a way that the frame itself can absorb some vibrations.
  Besides providing comfort to the rider, suspension systems improve traction and safety by helping to keep one or both wheels in contact with the ground.
context_section_description: "Horst Link" suspension is a type of four-bar linkage suspension. It is characterized by having both connecting links pivot on the seat tube, with the lower pivot located above the center of the bottom bracket, and the rear axle being located higher than the pivot connecting floating link and lower connecting link.
  Specialized has bought several of Leitner's patents which they use for their "FSR Suspension". Several manufacturer had licensed the design from Specialized. Some European manufacturers, such as Cube and Scott, do use the same suspension design, but couldn't import it to the United States until 2013 due to patent protection. Norco, Canadian bicycle manufacturer also licensed the design from Specialized but further optimized the FSR system, calling their own system Advanced Ride Technology (ART).
caption: Four-bar rear suspension
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