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@alex_s
Hi there, so the big ring of my R7000 chainset it dead and a change of chain means it's skipping all over the place...
I'm therefore in need of an R7000 50T chainring or, since I'm slowly harvesting parts for a future build which will also be 105, a whole 50/34 172.5 chainset which will fit either a Hollowtech BB or another British Threaded BB.