Originally Posted by
SoSmellyAir
No spacer needed if you use a CS-R7000 cassette, which (as
alcjphil explained above) technically excludes the 11-34 model, which is CS-HG700-11.
That’s the exact model I have, glad I asked then! It also has the designation HG-EV and HG-X11 on it. What is the reason that this particular range has a different spacer requirement? I wrongly assumed that the cassette body with on any 11 speed road cassette using the 11 speed narrow chain would be the same.