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Need help ordering XT 1x11 groupset

288GTO288GTO Posts: 79
edited June 2016 in MTB buying advice
Hey guys,

I have a rigid Giant 29er with SLX 3X10 groupset. I would like to upgrade to the XT 1x11 Drivetrain Groupset ($299 at Chainreaction, link below). Can someone tell me the difference between Bar Mount and I-Spec B?
Also I assume the left crank arm is included even though not pictured?

Thanks!

http://www.chainreactioncycles.com/us/e ... ramesforks

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