Shimano Ultegra FC-6503 Triple 30T Chainring
OE replacement inner most chainring for your 9 speed Shimano triple drivetrain. Proprietary 74mm bolt diameter works with Shimano triple cranks only. 30T ring is industry standard for the smallest ring on a triple crankset. The 6503 ring is cut from 7075 alloy and silver anodized for added strength.