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Shimano Dura Ace R9100 Chainrings - 11 Speed - Black / 53 / 4 Arm, 110mm
BCD: 110 mm bolt circle diameter, 4-arm asymmetrical. Anodized. Aluminium construction. Compatible with 11-speed Shimano set-ups. Easy pickup thanks to improved tooth shaping. Neat and reliable engagement. Hollowglide construction for improved weight savings.