Already posted this in the drivetrain forum, but, what can I say? I trust you the most, Ibis geeks....!
I know the long/short cage derailleur formula, and appreciate the sticky. I'm running a shimano 38/26 2x10 crankset with an 11-36 rear cassette. That puts me at a total capacity of 37 teeth. This suggests that for my new XT clutch rear derailleur I'll need the RD M780 SGS. (Long cage). The medium cage has a total capacity of 35, which is just a tad too small. So, this begs the question:
What will happen if I go with the medium cage, anyway?
For the record, this is on an Ibis Mojo HD 160. I'm also currently using the Ibis specific MRP 2x chain guide. (Does that alter the formula?) Hopefully, with the addition of the clutch derailleur, I won't need the guide. (Which would be great, because it's a flexy POS!) BUT, i might end up keeping the guide on if the clutch alone proves to be insufficient for chain retention. Thanks for your input.
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