OS-99 CSI UD CARBON STEM

FSA OS-99 CSI Stem

The FSA OS-99 CSI stem features the latest K-Force design and is crafted using CSI (Carbon Structural Integration), a process that permanently bonds carbon to aluminium to deliver the combined benefits of both materials.

3D forged and CNC-machined from AL2014 aluminium, the stem is finished with a UD carbon weave skin applied through the CSI process for added stiffness and reduced weight.A sculpted 4-bolt AL2014 aluminium/carbon faceplate and titanium screws further cut weight while maintaining strength and security.