Our premium shimano 1105bolt pattern oval chainrings are designed for pre 2014 cranks like shimano dura ace fc7900 fc7800 ultegra fc6750 shimano 105 5750 and many more with 5 bolt fitting these are finest shift able oval chainrings on the market advantages of absolute black road oval chainrings one of a kind special oval shape that helps you climb easier and faster patent pending over 15 stiffer than rotor qrings due to thicker 5mm construction bespoke absolute black 6 point