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  1. #1
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    SLX M670 3x10 to S7000 1x11 questions

    I'm making a list of what I need to convert my current 3x10 to a 1x11 drivetrain. I think I'm thinking of everything but I want to make sure before I pull the trigger.

    Here's what I currently have:
    SLX M670-B (i-spec B) 10-sp shifters
    SLX M670 rear mech (non clutched)
    FC-M622/625 175mm 96BCD cranks (symmetric mount holes)

    My current plan (but I'm open to suggestions) is to replace this with the following:
    SLX M7000 rear shifter i-spec B
    SLX M7000 11-sp rear mech, medium cage
    SunRace CSMX8 11-46T (much better spread of ratios than the current Shimano 11-46)
    Single w/n chainring that will fit my current cranks, eg

    96 mm Symmetrical BCD Chainrings for Shimano Compact Triple ? wolftoothcomponents.com

    or

    94/96 BCD Chainrings - OneUp Components US



    Q: Since the 10 and 11 speed rear mechs have the same pull ratios, is it possible to keep my current rear mech, or will I run into issues clearing the largest cog(s)? Or is it advisable to go with a shadow plus clutched rear mech regardless?

    Q: The price difference between SLX M7000 and XT M8000 is about $25, so money aside, which do you suggest?

    Q: Chain suggestions? I've read people having good luck with the SRAM PC-1110

  2. #2
    damned rocks...
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    Q1: you will have problems with clearance, you will need to hack it with a goat link, a rad cage, or both. You will be better off by buying a new mech.

    Q2: money aside the XT, but it would be better to buy a better shifter than a better dirrailleur, but I don't advice the current XT.

    Q3: I had a Shimano chain and decide to buy a SRAM chain based on people reports. In my opinion the major deference is the noise it makes when you shift.

  3. #3
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    Thanks for the info. So you'd actually recommend the current SLX M7000 over the XT M8000? I've read similar opinions elsewhere. Would you do SLX for both the shifter and rear mech, or a mix?

  4. #4
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    It's up to you.
    I have two setups one 1x11 M7000 shifter and mech, and one 1x10 mix of Zee shifter and M8000 rear mech.
    Go to a LBS and try a bike with a XT M8000 shifter, make your own opinion.
    Then try a bike with a SLX M7000 shifter and if you are willing to spend the cash try a bike with a M9000 shifter.
    Even if you can't ride the bikes try the actuation of the shifters.

  5. #5
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    Quote Originally Posted by Aglo View Post
    It's up to you.
    I have two setups one 1x11 M7000 shifter and mech, and one 1x10 mix of Zee shifter and M8000 rear mech.
    Go to a LBS and try a bike with a XT M8000 shifter, make your own opinion.
    Then try a bike with a SLX M7000 shifter and if you are willing to spend the cash try a bike with a M9000 shifter.
    Even if you can't ride the bikes try the actuation of the shifters.

    We ended up going with SLX M7000 shifters because the new XT's just feel so stiff. Went with XT rear mech - save some weight, add some "bling". ;-)

    Thanks for the input; trying them in person was the key.
    -Jesse

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