SPECIALITES SH 6800 ULTEGRA Single 10S Chainring x 39 Teeth Black

The X110 chainrings are compatible with the Shimano Dura Ace 9000/R9100, Ultegra 6800/8000 and 105 5800/R7000 11 speed chainsets For complete compatibility one must replace both inner and outer with TA rings Chainrings are designed to be compatible with the modern chainsets that have a cutout on one arm, they are also backwards compatible with the earlier chainsets that do not have the cutout