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  1. #1
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    x1 rear derailleur b screw measurement question

    how do you guys go about measuring this? the manual says 12-15mm iirc.

    do i just change gears to my lowest gear then measure the lowest cog tooth to the pulley?

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    2017 yeti sb6c turq x01 eagle

  2. #2
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    Omg 12-15mm clearance from big cog to upper jockey wheel.... Everything I know (and though I use Shimano it isn't really any different) is usually around a few mm. I set mine by just adjusting it closer till the chain has trouble/drags getting into big ring then back off little at a time just till it smoothes out. Usually end up around 4-5mm clearance. You can't "measure" unless chain is off which to me is was too much hassle. My method takes 5 minutes and I have perfect shifting top to bottom. Never needed adjust once set.

    I would thing the distance your wanting would kill shifting at the bottom of the cassette.

  3. #3
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    Quote Originally Posted by tigris99 View Post
    Omg 12-15mm clearance from big cog to upper jockey wheel.... Everything I know (and though I use Shimano it isn't really any different) is usually around a few mm. I set mine by just adjusting it closer till the chain has trouble/drags getting into big ring then back off little at a time just till it smoothes out. Usually end up around 4-5mm clearance. You can't "measure" unless chain is off which to me is was too much hassle. My method takes 5 minutes and I have perfect shifting top to bottom. Never needed adjust once set.

    I would thing the distance your wanting would kill shifting at the bottom of the cassette.
    a few mms really? wow let me check the manual cuz i would've sworn it was 12-15mm.
    2017 yeti sb6c turq x01 eagle

  4. #4
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    http://www.parktool.com/blog/repair-...icle-section-5

    Had to find the Link, but there's how you do it from Park.

  5. #5
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    Quote Originally Posted by tigris99 View Post
    Rear Derailleur Adjustment - Park Tool

    Had to find the Link, but there's how you do it from Park.
    ok i'll take a look. here's the manual for sram x1 rear derailleurs. see im not crazy lol

    x1 rear derailleur b screw measurement question-bscrew.png
    2017 yeti sb6c turq x01 eagle

  6. #6
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    Ya your not crazy, for some reason sram says set the x series further away, the others are about right, just a few mm. Must be something different with the way they function that they need to be further away.

    Still just eyeball it, no need to get all technical, promise you even an lbs just sets it by eyeball, nothing more

  7. #7
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    i just eye ball mine cuz its hard to get a ruler up in there lol.

    i only brought this up cuz my friend installed an x1 derailleur yesterday and asked why it's 12-16mm. i have no idea why, i just know thats what the manual says. ty
    2017 yeti sb6c turq x01 eagle

  8. #8
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    I can tell you from experience that 12-16mm is indeed correct. I had a noisy drive train until i properly adjusted the B screw. It didn't completely fix it, but it did make it better.

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