Compatibility: Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+ and many older cranks. Also fits Sram cranks with removable spider that have 1 hidden chainring bolt like Force22, Rival22. Compatible with Di2. Material: CNC machined 7075 Txxx Aluminum. Long-lasting construction Finish: Type II anodizing Ovality: 10.5-11.4% ; Timing of 112-113° after TDC (top dead center) - Patent Pending
Compatibility: Shimano Dura-Ace 7950, Ultegra 6750, Shimano 105- 5750, Tiagra 4650, FSA, Rotor 3D & 3D+ and many older cranks. Also fits Sram cranks with removable spider that have 1 hidden chainring bolt like Force22, Rival22. Compatible with Di2. Material: CNC machined 7075 Txxx Aluminum. Long-lasting construction Finish: Type II anodizing Ovality: 10.5-11.4% ; Timing of 112-113° after TDC (top dead center) - Patent Pending