ABSOLUTE BLACK SRAM Oval Traction Chainring Material: CNC machined 7075 Txxx aluminum Teeth: 30 t, 32 t, 34 t, 36 t Bolt Circle Diameter: 104 mm, 94 mm Connection: 4-bolt, M8 regular "double" bolts Compatible Components: [104 BCD] Race Face, FSA, [94 BCD] SRAM X01, SRAM X1, SRAM GX, SRAM NX