The Shimano Ultegra FC-R8000 11-Speed Chainrings are compatible with Shimano R8000 cranksets and other, 110 BCD 4-bolt cranksets. The chainrings feature an updated tooth design which results in improved shifting and chain retention. 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.
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