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Got a new frameset, don't know why I need this split ring collar?


What's the easiest way to insert a star nut into a steerer tube?Which headset to replace my FSA No.10?How do I fix movement in headsetMissing a part from an internally threaded steer tubeStar Nut Replacement SizeKona Mahuna 2013 headset change question.Can a headset base spacer ring be removed?Can a threaded headeset be converted to a threadless headsetIs my carbon fork steerer tube damaged by overtightened stem boltsHow did my headset get this way?













3















I can work out all the bits of the semi integrated headset, the star fangled nut for the steerer, but I can't see why I need this?



It has similar diameter to the steerer tube, is it a spacer? I don't get it! :/



enter image description here










share|improve this question
























  • Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

    – Criggie
    13 mins ago















3















I can work out all the bits of the semi integrated headset, the star fangled nut for the steerer, but I can't see why I need this?



It has similar diameter to the steerer tube, is it a spacer? I don't get it! :/



enter image description here










share|improve this question
























  • Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

    – Criggie
    13 mins ago













3












3








3








I can work out all the bits of the semi integrated headset, the star fangled nut for the steerer, but I can't see why I need this?



It has similar diameter to the steerer tube, is it a spacer? I don't get it! :/



enter image description here










share|improve this question
















I can work out all the bits of the semi integrated headset, the star fangled nut for the steerer, but I can't see why I need this?



It has similar diameter to the steerer tube, is it a spacer? I don't get it! :/



enter image description here







headset steerer






share|improve this question















share|improve this question













share|improve this question




share|improve this question








edited 8 hours ago









Swifty

4,0731831




4,0731831










asked 11 hours ago









Tom RhodesTom Rhodes

263




263












  • Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

    – Criggie
    13 mins ago

















  • Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

    – Criggie
    13 mins ago
















Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

– Criggie
13 mins ago





Welcome to Stack Exchange - thank you for a well-formed question with a useful photo.

– Criggie
13 mins ago










2 Answers
2






active

oldest

votes


















6














That looks like the compression ring for a threadless headset.



enter image description here

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license

More information found at Sheldon Brown






share|improve this answer

























  • Aha! Superb thankyou, that diagram is about to come in very handy!

    – Tom Rhodes
    8 hours ago






  • 2





    Might be worth crediting the image author for completeness

    – Swifty
    4 hours ago











  • @Swifty Thanks!

    – David D
    1 hour ago


















5














It is indeed a compression ring, David D’s diagram is helpful to illustrate the following:



What it does is transfer the force of the cap bolt to the inner face of the cartridge bearing. That then compresses the ball bearings inside properly, as they need to be, which is why the split ring is called a compression ring. The angled face must fit into the angled bearing race to do so, so both must be the right way round.



The crown race does the same job of compressing the lower bearing from below, see how it has the same angle on it, just facing upwards instead.



Together, the compression ring and the crown race squeeze the whole headset bearing assembly together, allowing proper and safe adjustment.



You need to fit it!



Also make sure you get all the parts in the correct orientation or you won’t have a safe and adjustable headset.






share|improve this answer























    Your Answer








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    2 Answers
    2






    active

    oldest

    votes








    2 Answers
    2






    active

    oldest

    votes









    active

    oldest

    votes






    active

    oldest

    votes









    6














    That looks like the compression ring for a threadless headset.



    enter image description here

    Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license

    More information found at Sheldon Brown






    share|improve this answer

























    • Aha! Superb thankyou, that diagram is about to come in very handy!

      – Tom Rhodes
      8 hours ago






    • 2





      Might be worth crediting the image author for completeness

      – Swifty
      4 hours ago











    • @Swifty Thanks!

      – David D
      1 hour ago















    6














    That looks like the compression ring for a threadless headset.



    enter image description here

    Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license

    More information found at Sheldon Brown






    share|improve this answer

























    • Aha! Superb thankyou, that diagram is about to come in very handy!

      – Tom Rhodes
      8 hours ago






    • 2





      Might be worth crediting the image author for completeness

      – Swifty
      4 hours ago











    • @Swifty Thanks!

      – David D
      1 hour ago













    6












    6








    6







    That looks like the compression ring for a threadless headset.



    enter image description here

    Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license

    More information found at Sheldon Brown






    share|improve this answer















    That looks like the compression ring for a threadless headset.



    enter image description here

    Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license

    More information found at Sheldon Brown







    share|improve this answer














    share|improve this answer



    share|improve this answer








    edited 1 hour ago

























    answered 10 hours ago









    David DDavid D

    2,658214




    2,658214












    • Aha! Superb thankyou, that diagram is about to come in very handy!

      – Tom Rhodes
      8 hours ago






    • 2





      Might be worth crediting the image author for completeness

      – Swifty
      4 hours ago











    • @Swifty Thanks!

      – David D
      1 hour ago

















    • Aha! Superb thankyou, that diagram is about to come in very handy!

      – Tom Rhodes
      8 hours ago






    • 2





      Might be worth crediting the image author for completeness

      – Swifty
      4 hours ago











    • @Swifty Thanks!

      – David D
      1 hour ago
















    Aha! Superb thankyou, that diagram is about to come in very handy!

    – Tom Rhodes
    8 hours ago





    Aha! Superb thankyou, that diagram is about to come in very handy!

    – Tom Rhodes
    8 hours ago




    2




    2





    Might be worth crediting the image author for completeness

    – Swifty
    4 hours ago





    Might be worth crediting the image author for completeness

    – Swifty
    4 hours ago













    @Swifty Thanks!

    – David D
    1 hour ago





    @Swifty Thanks!

    – David D
    1 hour ago











    5














    It is indeed a compression ring, David D’s diagram is helpful to illustrate the following:



    What it does is transfer the force of the cap bolt to the inner face of the cartridge bearing. That then compresses the ball bearings inside properly, as they need to be, which is why the split ring is called a compression ring. The angled face must fit into the angled bearing race to do so, so both must be the right way round.



    The crown race does the same job of compressing the lower bearing from below, see how it has the same angle on it, just facing upwards instead.



    Together, the compression ring and the crown race squeeze the whole headset bearing assembly together, allowing proper and safe adjustment.



    You need to fit it!



    Also make sure you get all the parts in the correct orientation or you won’t have a safe and adjustable headset.






    share|improve this answer



























      5














      It is indeed a compression ring, David D’s diagram is helpful to illustrate the following:



      What it does is transfer the force of the cap bolt to the inner face of the cartridge bearing. That then compresses the ball bearings inside properly, as they need to be, which is why the split ring is called a compression ring. The angled face must fit into the angled bearing race to do so, so both must be the right way round.



      The crown race does the same job of compressing the lower bearing from below, see how it has the same angle on it, just facing upwards instead.



      Together, the compression ring and the crown race squeeze the whole headset bearing assembly together, allowing proper and safe adjustment.



      You need to fit it!



      Also make sure you get all the parts in the correct orientation or you won’t have a safe and adjustable headset.






      share|improve this answer

























        5












        5








        5







        It is indeed a compression ring, David D’s diagram is helpful to illustrate the following:



        What it does is transfer the force of the cap bolt to the inner face of the cartridge bearing. That then compresses the ball bearings inside properly, as they need to be, which is why the split ring is called a compression ring. The angled face must fit into the angled bearing race to do so, so both must be the right way round.



        The crown race does the same job of compressing the lower bearing from below, see how it has the same angle on it, just facing upwards instead.



        Together, the compression ring and the crown race squeeze the whole headset bearing assembly together, allowing proper and safe adjustment.



        You need to fit it!



        Also make sure you get all the parts in the correct orientation or you won’t have a safe and adjustable headset.






        share|improve this answer













        It is indeed a compression ring, David D’s diagram is helpful to illustrate the following:



        What it does is transfer the force of the cap bolt to the inner face of the cartridge bearing. That then compresses the ball bearings inside properly, as they need to be, which is why the split ring is called a compression ring. The angled face must fit into the angled bearing race to do so, so both must be the right way round.



        The crown race does the same job of compressing the lower bearing from below, see how it has the same angle on it, just facing upwards instead.



        Together, the compression ring and the crown race squeeze the whole headset bearing assembly together, allowing proper and safe adjustment.



        You need to fit it!



        Also make sure you get all the parts in the correct orientation or you won’t have a safe and adjustable headset.







        share|improve this answer












        share|improve this answer



        share|improve this answer










        answered 9 hours ago









        SwiftySwifty

        4,0731831




        4,0731831



























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