Our premium shimano 1105 bolt 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 this is shift able chainring for 2x cranks key features cnc machined 7075 txxx aluminium long lasting construction compatibility all rotor road cranks shimano dura ace 7900 7950 7800 ultegra 6750 shimano 105 5700 tiagra 4650 fsa and more also sram force and red but not compatible with