The rotor noq 110bcd inner chainring round chainrings will always be here to stay and rotor wanted to complement their oval range with the traditional round chainrings 100 cnc machined these inner chainrings are available in various sizes and for cranks 5 spider with 110 or 130 bcd rotor noq 110bcd inner chainring features 0 ovality noq chainrings offer the performance benefits inherent in round rings 100 cnc machined 7075 t6 aluminium alloy inner ring only fitting 11