6800 and 9000 may have eliminated the compact/standard issue but they are a proprietary chain ring and although I haven't seen any Shimano chainrings advertised for sale for these cranks, I would point out that 7900 outer rings had a list price of £200 and the inners £50 ...
6800 and 9000 may have eliminated the compact/standard issue but they are a proprietary chain ring and although I haven't seen any Shimano chainrings advertised for sale for these cranks, I would point out that 7900 outer rings had a list price of £200 and the inners £50 ...