Absoluteblack premium cyclocross 1104 bolt pattern oval chainrings are designed for new shimano cranks like dura ace 9000 ultegra 6800 shimano 5800 and others ideal for 1x conversion of your road crank traction at a fraction of the price key features narrow wide chainring cnc machined 7075 txxx aluminium long lasting construction compatibility shimano dura ace 9000 ultegra 6800 shimano 105 5800 tiagra 4700 and similar