Shimano
Dura-Ace FC-R9200 12-Speed Outer Chainring

Don't worry though, we have a lot more Gravel & Cyclocross Cranksets & Chainrings in stock than that.

Material: aluminum
Number of Rings: 1
Teeth: 50T
Bolt Circle Diameter: Asymmetric 110mm
Connection: Asymmetric 4-Bolt
Compatible Components: C-R9200 and FC-9200-P 2x 12-speed cranksets, 12-speed chains
Activity: road cycling
Manufacturer Warranty: [components] 2 years, [dura-ace & XTR] 3 years

California Proposition 65

Cancer - P65Warnings.ca.gov

Tech Specs