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hippy
Brommers
Nope, Cervelo and Brommers Bikes double oversized tubing steel frame, standard RDs in both cases. No further issues after I fitted Rotor chainrings, and the Praxis rings have worked fine with a mechanical DA9000 groupset (except for the crankset - SISL2 crank arms with a P2M spider) after I'd removed them from one of the Di2 bikes. Makes absolutely no sense, I know, but there it is.