The absoluteBLACK Premium Shimano 110/4 bcd compatible oval chainrings are designed for the new type of Shimano Dura-Ace 9100, Ultegra 8000 and 105 R7000 cranksets.
AbsoluteBLACK Premium Shimano 110/5 bcd compatible ROUND chainrings are designed for cranks such as Shimano Dura-Ace FC7950, Ultegra FC6750, Shimano 105 -5750 and many more with 5-bolt adjustment.