FSA SL-K Super Road ABS Chainring 50T 110ABS 4H N11. The FSA SL-K Super Road ABS Chainring is designed for high-performance road cycling offering precise shifting and efficient power transfer. Built with advanced materials and an asymmetric bolt pattern it integrates seamlessly with FSAs modular crank systems. This chainring is ideal for riders who demand durability and drivetrain responsiveness in competitive or high-mileage settings.