absoluteBLACK Premium Oval 110 BCD Road Outer Chainring for Shimano Dura-Ace 9000 – 50t 110 Shimano Asymmetric BCD 4-Bolt Black. absoluteBLACK Premium Oval 110 BCD Road Chainrings utilize absoluteBLACKs top-tier design features to greatly improve traction and speed. They are designed for Shimano 4-bolt cranks like Dura-Ace 9000 Ultegra 6800 105 5800 and others. Optimized with smooth shifting in mind premium chainrings have a 6-point ramp and recess design. Chainrings are crafted from CNC machined 7075 aluminum and feature an anodized finish for exceptional durability.

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