ABSOLUTE BLACK SRAM CX Oval Direct Mount Chainring Material: CNC machined 7075 Txxx aluminum Number of Rings: 1 Teeth: 36 t, 38 t, 40 t, 42 t Connection: direct-mount Compatible Components: SRAM Force 22 GXP and BB30, SRAM Force 1 GXP and BB30, SRAM CX1 GXP and BB30, SRAM Rival 22 GXP and BB30, SRAM Rival 1 GXP and BB30, SRAM S900 GXP and BB30, SRAM XX1, SRAM X01, SRAM X0, SRAM X9, SRAM X7, SRAM S2210, SRAM S1400 GXP and long spindle BB30 (with spacer)