Introducing the new ALDHU 3D+ one-piece oval Spidering with OCP Mount. OCP Mount’s patent-pending, proprietary technology allows the oval Spidering to be adjusted in 1-degree increments for optimized pedaling biomechanics. 12.5% ovality heightens the performance advantages of oval chainrings; no other oval chainring in the growing oval chainring category offers the adjustment options plus unique ovality all aimed at improving pedaling performance. Specifications:Color: Black AnodizedNumber Of Teeth: 34, 36, 39, 50, 52, 53Bcd: NoTechnologies: Alu7075, CNC, Direct Mount, OCP MountQring Type: Inner, OuterCompatibility: NoDiscipline: Road