SRAM RED X-Sync Chainring - 40t, 12/13-Speed, 8-Bolt Direct Mount, 6.5mm Offset, Black/Silver, E1!

SRAM's light, stiff, and durable direct mount RED X-Sync chainrings let you pick the exact gearing you want and quickly swap sizes. X-Sync technology keeps the chain where you need it to be, too.