Full Speed Ahead Energy Modular Direct Mount Chainring - 50t Outer Ring FSA Direct Mount For use 34t Inner Ring BLKFull Speed Ahead Energy Modular Direct Mount Chainring 50t Outer Ring FSA Direct Mount For use with 34t Inner Ring Black. Full Speed Aheads Energy Modular Direct Mount Chainrings are designed for 2x road and gravel cranksets and feature shifting ramps and stainless steel pins on outer rings. Precision CNC machined AL7075 T6 Shifting ramps and stainless steel pins on outer rings Black anodized finish Laser etched logo Compatible with Modular cranksets