Compatible with 11 speed Shimano driver hub interfaces, this robust alloy freehub is perfect for breathing new life back into your FSA/ Vision wheel. Genuine Vision spare part. Vision products were launched nearly 20 years ago at the Kona Iron Man. Since then they have earned the reputation of being amongst the fastest & most aerodynamic components in the professional field. Vision components are designed using Computational Fluid Dynamics (CFD) software & verified through extensive wind tunnel testing, then proven under its sponsored professional athletes to guarantee you the highest performance.