The Rotor Round Ring 1X Direct Mount chainring is also compatible with Shimano Dura-Ace FC-9100 and Ultegra FC-8000 cranksets, offering fast and precise shifting while maintaining a very low weight.ROTOR round chainrings complete the range of chainrings for those cyclists who have not yet decided to try Q RINGS oval chainrings.When you´re looking for speed, functionality, and lightness, the components of your bicycle must reflect these needs.Features:- Use: Road.- BCD: 110x4.- Weight: 120.5 g (50/34T) 90 g (50T) 30.5 g (34T).- Chainline: 43.5 mm (using standard axle). 46 mm (using offset axle).- Material: 7075-T6 aluminum alloy 100% CNC machined.- Compatible 1 cranksets: All ROTOR cranksets using the BCD 110x4 spider. All ROTOR cranksets using the INspider power meter. Shimano Dura-Ace FC-9100. Shimano Ultegra FC-8000.- Compatible groupsets: Shimano 11s & 10s. SRAM 11s.- Compatible chains: 11s chains.