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FSA OS-99 CSI Stem

Product Code FSS175-0320B
Other products by FSA


    NOTE: Price applies to Online sales only, pricing may differ in our Retail store.
  • In-store: Expect delivery in 2-3 days.
  • Available to Order: With our Supplier, expect delivery in 4-7 days.
  • This item comes with free shipping.


The K-Force OS-99 CSI is 3-D forged and CNC machined from AL2014 before a uni-directional (UD) carbon weave skin applied through the Carbon Structural Integration (CSI) process. To further reduce weight the OS-99 uses a 4-bolt sculpted AL2014 alloy/carbon faceplate and titanium hardware. CSI is a process that permanently bonds carbon to alloy, to create a true hybrid product, with many of the benefits of aluminium and carbon.

Key Features
  • 3D forged and CNC machined from AL2014
  • UD carbon weave skin applied through CSI process
  • 41mm fork clamp stack height
  • Finish UD carbon finish
  • Weight: 126g (100mm)
  • Sizes:± 6° x L80, 90, 100, 110, 120, 130mm

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