OS (Operating Systems)

FSA OS-99 CSI Carbon Stem Parts Mountain Stems

FSA OS-99 CSI Carbon Stem. The FSA OS-99 CSI Carbon Stem is the perfect means to help lighten and stiffen your bike's cockpit. FSA truly pulled out all the stops with the utilization of their Carbon Structural Integration (CSI) technology, the fusion of carbon fiber and aluminum, in the construction of this stem. A structural outer layer of carbon fiber is wrapped around an aluminum core to not only increase stiffness but also create an elegant carbon aesthetic. Simply put, you've got a rock-solid platform ...

MPN: a582c8859c6c34d3c09c792c1c351047