Series of four-hole chainrings with High Stiffness Points (HSP), compatible with the Shimano ® 105 FC-7100 12v crank set. Manufactured from CNC-machined AL 7075 T6 aluminium alloy. Black finish with total anodizing surface treatment (TT). Five teeth options available for internal chainrings and three for external chainrings. Aluminium chainring bolts included.