FSA Powerbox Aero Road ChainringThis road bike chainring is specifically designed for use with 11 speed FSA Powerbox Systems. It features a hard-wearing alloy construction, which makes it perfect for handling all the abuse that’s associated with long days out on the road. FSA has also completed this model with laser-etched graphics, which make it looks as amazing as it performs. This makes it a great upgrade for riders who want smooth, reliable and powerful torque on every journey.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 chainrings match a chain. We offer more options, levels, and finishes than our competitors. We use the best materials available, imported from the USA, 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 your expectations. Features: Material: Alloy Finish: Laser etched Vision logoUse: Road BCD: 110mm Bolt Spacing: Asymmetric Compatibility: Shimano Mounting: Bolts Speed: 11 speed Tooth Shape: Standard Precision aero chainrings designed for FSA Powerbox Systems Ramped and pinned for a specific size chainring – the number in brackets – for the most precise shifting possible Manufacturer’s Part Number: 46T(55): 670-0250012010; 56T(46): 670-0248009010; 55T(44): 670-0245008010; 56T(44): 670-0246009010; 55T(46): 670-0247008010 and 44T(56): 670-0249010010Buy FSA Components from Chain Reaction Cycles, the World’s Largest Online Bike Store.