What do your current rotors look like in regards to wear? If the brake track is worn where it should be then all good.
The wear does extend down the arms past the rotors by a couple of mm.
This partially backs up the theory, but I can't find anything definitive.
Is there an unworn bit around the edge, if not I wouldn't worry.
I’ve ran bb5/7s with all sorts of rotors including centrelock Shimano and haven’t noticed any effect on brake performance.
I’d say wear down the arms a bit is better than adapter faff anyway.
@se1derful started
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What do your current rotors look like in regards to wear? If the brake track is worn where it should be then all good.