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The (unofficial) capacity is significantly larger isn't it?
No, the geometry is the same. Anything an R8000 can do an R7000 can do cheaper.
they're the functionally the same?
For 8000 vs. 7000, yes. 6800 and 5800 are old school, the same as each other but different from modern RDs.
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With very few exemptions, the only difference between Shimano 11 speed components of the same generation is weight.
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I've got an R7000 rear mech on my gravel bike, with a 11-40 cassette. Works fine without longer b-screw or hanger extender.
gbj_tester
grams
AlexD
@frankenbike
Is the R8000 rear derailleur worth the extra over an R7000/6800/5800 on a normal road bike? For practical reasons, not buyer logic
The (unofficial) capacity is significantly larger isn't it? To the point you can get away with 11-40. Otherwise they're the functionally the same?