The Shimano 105 FC-R7000 11-Speed Chainrings are compatible with Shimano R7000 cranksets and other, 110 BCD 4-bolt cranksets. The aluminum construction uses Hollowglide technology to maximize stiffness while maintaining a low weight. They are available in 50/34, 52/36 and 53/39 sizes and are intended for use with Shimano 11-speed groupsets.