The Ultegra 6800 Outer Chainring from Shimano is a genuine Shimano replacement part. It uses a 4-arm design which is not only stiff but also lightweight and uses the same spider for both inner and outer chainrings. It is 11-Speed compatible and available in Black, outer chainring only.

This chainring also features HollowGlide technology which provides great improvements to the stiffness and rigidity by virtually removing any outer chainring flex and in turn improves shift performance, even under high load.