10 speed talk. Is a 105 brifter compatible with an XT mech?
No, needs a cable pull widget thing. 9-speed mountain derailleur would work.
http://blog.artscyclery.com/science-behind-the-magic/science-behind-the-magic-drivetrain-compatibility/
@Quincy started
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10 speed talk.
Is a 105 brifter compatible with an XT mech?