FSA Pro Black Triple 130/74BCD Road Chainring - 130BCD 39T Precision CNC machined AL70756 alloy N-10 chainrings are compatible with Shimano, SRAM and Campagnolo Ultra Narrow 10-Speed drive trains S9/C10 chainrings are compatible with Shimano 9 speed and Campagnolo C10 10-Speed N-11 chainrings are compatible with all 10 speed drivetrains, and compatible with FSA, SRAM and Shimano 11 speed drivetrains Mfg# WB090-39T