What does this barrel adjuster do on the rear derailleur (SRAM Apex 1)?

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up vote
3
down vote

favorite












On this SRAM Apex 1 derailleur, what does this barrel adjuster do?



What happens if I turn it clockwise/anti-clockwise?



enter image description here






derailleur sram adjustment







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  • FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
    – Argenti Apparatus
    31 mins ago










  • Perfect. Thanks for pointing this out too.
    – Johnny
    19 mins ago














up vote
3
down vote

favorite












On this SRAM Apex 1 derailleur, what does this barrel adjuster do?



What happens if I turn it clockwise/anti-clockwise?



enter image description here






derailleur sram adjustment







share|improve this question





















  • FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
    – Argenti Apparatus
    31 mins ago










  • Perfect. Thanks for pointing this out too.
    – Johnny
    19 mins ago












up vote
3
down vote

favorite









up vote
3
down vote

favorite











On this SRAM Apex 1 derailleur, what does this barrel adjuster do?



What happens if I turn it clockwise/anti-clockwise?



enter image description here






derailleur sram adjustment







share|improve this question













On this SRAM Apex 1 derailleur, what does this barrel adjuster do?



What happens if I turn it clockwise/anti-clockwise?



enter image description here






derailleur sram adjustment




derailleur sram adjustment






share|improve this question













share|improve this question











share|improve this question




share|improve this question










asked 1 hour ago









Johnny

1206




1206











  • FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
    – Argenti Apparatus
    31 mins ago










  • Perfect. Thanks for pointing this out too.
    – Johnny
    19 mins ago
















  • FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
    – Argenti Apparatus
    31 mins ago










  • Perfect. Thanks for pointing this out too.
    – Johnny
    19 mins ago















FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
– Argenti Apparatus
31 mins ago




FYI your B adjustment screw (silver screw above the barrel adjuster) is backed almost all the way out. It's not supposed to be like that. B screw adjustment is covered in the Park Tool video linked in my answer.
– Argenti Apparatus
31 mins ago












Perfect. Thanks for pointing this out too.
– Johnny
19 mins ago




Perfect. Thanks for pointing this out too.
– Johnny
19 mins ago










2 Answers
2






active

oldest

votes

















up vote
1
down vote



accepted










It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets.



Mountain bike shifter units have barrel adjusters, road bikes use this one as well as having frame mounted or 'in-line' adjusters some where on the housing run.



This video from park Tool Company has a good visualization of how it works:









share|improve this answer



























    up vote
    3
    down vote













    Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:









    share|improve this answer




















    • Video does have the answer, but link only answers are discouraged here.
      – Argenti Apparatus
      15 mins ago










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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes








    up vote
    1
    down vote



    accepted










    It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets.



    Mountain bike shifter units have barrel adjusters, road bikes use this one as well as having frame mounted or 'in-line' adjusters some where on the housing run.



    This video from park Tool Company has a good visualization of how it works:









    share|improve this answer
























      up vote
      1
      down vote



      accepted










      It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets.



      Mountain bike shifter units have barrel adjusters, road bikes use this one as well as having frame mounted or 'in-line' adjusters some where on the housing run.



      This video from park Tool Company has a good visualization of how it works:









      share|improve this answer






















        up vote
        1
        down vote



        accepted







        up vote
        1
        down vote



        accepted






        It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets.



        Mountain bike shifter units have barrel adjusters, road bikes use this one as well as having frame mounted or 'in-line' adjusters some where on the housing run.



        This video from park Tool Company has a good visualization of how it works:









        share|improve this answer












        It lengthens or shortens the housing length to adjust the lateral position of the derailleur cage. It's used to adjust derailleur 'indexing' so that the chain sits properly on the cassette sprockets.



        Mountain bike shifter units have barrel adjusters, road bikes use this one as well as having frame mounted or 'in-line' adjusters some where on the housing run.



        This video from park Tool Company has a good visualization of how it works:


















        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 35 mins ago









        Argenti Apparatus

        25.8k23067




        25.8k23067




















            up vote
            3
            down vote













            Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:









            share|improve this answer




















            • Video does have the answer, but link only answers are discouraged here.
              – Argenti Apparatus
              15 mins ago














            up vote
            3
            down vote













            Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:









            share|improve this answer




















            • Video does have the answer, but link only answers are discouraged here.
              – Argenti Apparatus
              15 mins ago












            up vote
            3
            down vote










            up vote
            3
            down vote









            Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:









            share|improve this answer












            Better than a long answer watch this video for a comprehensive explanation of the settings of the RD:


















            share|improve this answer












            share|improve this answer



            share|improve this answer










            answered 1 hour ago









            Carel

            2,9941811




            2,9941811











            • Video does have the answer, but link only answers are discouraged here.
              – Argenti Apparatus
              15 mins ago
















            • Video does have the answer, but link only answers are discouraged here.
              – Argenti Apparatus
              15 mins ago















            Video does have the answer, but link only answers are discouraged here.
            – Argenti Apparatus
            15 mins ago




            Video does have the answer, but link only answers are discouraged here.
            – Argenti Apparatus
            15 mins ago

















             

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