R8000 Chainring on a 105 5800 crank

@Nasar_Maatougui no because the bolt locations are slightly different. For the 105 FC-R5800 you would need 5800 or 6800 or 9000 chainrings.

For example this would work: https://www.excelsports.com/main.asp?page=8&description=Ultegra+FC-6800+Outer+Chainring&vendorCode=SHIM&major=1&minor=12

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