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DA CS-R9100 is compatible with Di2 6870, right?

Cyclocross and Gravelbiking (Recreational) This has to be the most physically intense sport ever invented. It's high speed bicycle racing on a short off road course or riding the off pavement rides on gravel like : "Unbound Gravel". We also have a dedicated Racing forum for the Cyclocross Hard Core Racers.

DA CS-R9100 is compatible with Di2 6870, right?

Old 09-20-17, 09:04 PM
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DA CS-R9100 is compatible with Di2 6870, right?

Again, sanity check, I need a cassette for my new wheels. I'm looking at the 12-28. I'd be happy with Ultegra but it looks like I need to go DA to trade the 11T. I spend most of my time in the middle of the cassette and this suits my preferences. I've got a short cage RD so I think 28T is the limit on the big end.
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