OS-99 CSI stem

€199.00* *22% VAT included
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The K-Force OS-99 CSI stem is 3-D forged and CNC machined from AL2014. Then it’s combined with a carbon structure using our CSI (Carbon Structural Integration) technology. CSI is a process that permanently bonds carbon to alloy to create a true hybrid product, with many of the benefits of aluminum and carbon. The final details reduce the OS-99 stems weight by using a 4-bolt sculpted AL2014 alloy/carbon faceplate and titanium hardware.


  • 3D forged and CNC machined from AL2014
  • Carbon Structural Integration Technology
  • 41mm fork clamp stack height
  • UD Carbon Finish
  • 41mm Clamp Stack Height
  • Weight 125 grams (100mm)


Code Type
175-0317BKG ST ROAD OS-99 CSI 100mm ±6° V14
175-0318BKG ST ROAD OS-99 CSI 110mm ±6° V14
175-0319BKG ST ROAD OS-99 CSI 120mm ±6° V14
175-0321BKG ST ROAD OS-99 CSI 130mm ±6° V14
175-0322BKG ST ROAD OS-99 CSI 60mm ±6° V14
175-0323BKG ST ROAD OS-99 CSI 70mm ±6° V14
175-0320BKG ST ROAD OS-99 CSI 80mm ±6° V14
175-0316BKG ST ROAD OS-99 CSI 90mm ±6° V14


Type Stems
Technology CSI, No
Color Neutral
Discipline ROAD
Material Carbon
Weight (gr) 126