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    The issue is that R7000, R8000 and R9000 cranks all have different 'three dimensional' profiles to the crank spider arms which is continued into the chainrings. Different series rings and cranks definitely do not match, and it is unclear if there is clearance issues which would prevent rings from one series being installed on a different series crank.
    – Argenti Apparatus
    Commented Jul 29, 2020 at 17:41
  • 1
    How many miles on the chain rings? Are you certain it's the rings that need replacing rather than the chain? I ask because I will go through many chains before a chain ring ever needs replacement and I typically average 6k miles or more from a chain. The cassette, chain ring, and chain all wear at different rates but they will "bed-in" together, so you may still have to sort some shifting issues after replacing the rings.
    – jc allen
    Commented Oct 6, 2020 at 18:20
  • You have an option to use aftermarket rings such as the TA X110 rings with the aesthetically pleasing bolts. The lower series rings will bolt on but there will be exposed "sharp" edges in some places where the ring/spider meet.
    – Noise
    Commented Oct 11, 2020 at 21:26
  • What’s the durability like between the 105 and Ultegra rings? It may be better to buy the nicer ones if they’re more durable.
    – MaplePanda
    Commented Oct 24, 2020 at 23:30