The K-Force OS-99 CSI stem is 3D forged and CNC machined from AL2014. It's essentially a carbon fiber construction using our CSI (Carbon Structural Integration) technology. CSI is a process that permanently bonds carbon to aluminum to create a hybrid product with many of the benefits of both aluminum and carbon. The final touches reduce the weight of the OS-99 stems using a 4-bolt AL2014 alloy plate and titanium hardware.

• 3D forged and CNC machined from AL2014
• Carbon structural integration technology
• Clamping stack height 41 mm
• UD carbon finish
• Clamping stack height 41 mm
• Weight 125 grams (100 mm)
• Angle 6 degrees