4-arm road chainrings. CNC machined 7075 T6 aluminum. Compatible with: Shimano Ultegra 6800 and Dura Ace 9000. BCD: 110 mm. - BCR-26-P110-53T Part Number: 2909692653 Barcode: 8716683089028, 8716683074956, 8716683088991, 8716683091649, 8716683089004, 8716683091847, 8716683089028 Product Code: BCR-26-P110-53T