Full Speed Ahead SLK Modular Direct-Mount Chainring 11-Speed 48t Black ModelNumber=K4727 They are engineered to use

They are engineered to use the largest possible ball size and are filled with high-pressure waterproof lubricant

5 mm thickness and aggressive block patterned surface texture shock and vibrations are absorbed delivering the perfect grip and bike control on the most technically demanding terrain

Underneath is a square profile chain made of hardened steel alloy

CNC-machined aluminum lever and clamp

Full Speed Ahead SLK Modular Direct-Mount Chainring 11-Speed 48t Black ModelNumber=K4727 They are engineered to useFull Speed Ahead SLK Modular Direct Mount Chainring 11 Speed 48t Black. Full Speed Ahead chainrings have powered multiple World Tour de France and Olympic champions and will exceed your expectations. Chainring can be used with FSA SL K 90 BCD inner chainrings Precision CNC machined AL7075 T6 Shifting ramps and stainless steel pins on outer rings Black anodized finish with laser etched logo Compatible with FSA Modular crankset (Gossamer Energy SL K K