CNC Machined from AL7075/T6 the PRO chainrings are ramped and pinned for perfect shifting. The Pro chainrings are available for 9 or 10-speed drivetrains. DESCRIPTION & MATERIALS - Precision CNC machined AL7075/T6 - Shifting ramps and stainless steel pins on outer rings SIZES - 46/36T, 50/34T, 52/36T FINISH - Black anodized with CNC silver - Laser etched logo ROAD CHAINRINGS Shifting performance has helped Full Speed Ahead to become a world leader for high-end chainrings. No one studies the design and manufacturing of each system, and each tooth, as carefully as we do. Our dedication shows in every revolution of the crank, and every perfect shift achieved. To meet or exceed the needs of any drivetrain, Full Speed Ahead has developed sophisticated design, testing and manufacturing protocols. This allows Full Speed Ahead to match your needs as perfectly as our chain-rings match a chain. We offer more options, levels, and finishes than our competitors. We use the best materials available, imported from the USA, or Europe, or sourced from our qualified vendors in Asia, to guarantee the durability, performance, and appearance will out perform, and outlast the competition. Full Speed Ahead chainrings have powered multiple World, Tour de France, and Olympic champions, and will exceed the needs of your production.