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  1. #1
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    Upgrading my 29er with SLX to XT 1X11-need help

    Hey guys,

    I have a rigid Giant 29er with and 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?

    Thanks!

    Shimano XT 1x11 Drivetrain Groupset | Chain Reaction Cycles

  2. #2
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    Quote Originally Posted by 288GTO View Post
    Hey guys,

    I have a rigid Giant 29er with and 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?

    Thanks!

    Shimano XT 1x11 Drivetrain Groupset | Chain Reaction Cycles
    ISpec shifters mount to the brake lever, so you need a ISpec brake lever to mount the shifter. Bar mount is just that traditional shifter that mounts to the bar.
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  3. #3
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    Quote Originally Posted by TwoTone View Post
    ISpec shifters mount to the brake lever, so you need a ISpec brake lever to mount the shifter. Bar mount is just that traditional shifter that mounts to the bar.
    got it, thanks!

  4. #4
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    Here is some good additional info. Just Googled it.

    Shimano I-Spec A, B and II mounts explained - BikeRadar USA
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  5. #5
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    These shifter are I-Spec II which is different from the ISpec A & B. I just upgraded to XT-M780 Shifters which mounted to SLX M675B Brakes with ISpec-B. Only problem I ran into was finding the bolt kit which is a rather pricey $12 (for 4 bolts) considering the left shifter was $10 used. It should all depend on what type of brake lever you currently have if this setup will work.

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