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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?













2















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





























    2















    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



























      2












      2








      2








      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 7 hours ago









      Swifty

      4,0631831




      4,0631831










      asked 9 hours ago









      Tom RhodesTom Rhodes

      163




      163






















          2 Answers
          2






          active

          oldest

          votes


















          5














          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
            7 hours ago






          • 1





            Might be worth crediting the image author for completeness

            – Swifty
            2 hours ago











          • @Swifty Thanks!

            – David D
            18 mins ago



















          4














          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
























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            2 Answers
            2






            active

            oldest

            votes








            2 Answers
            2






            active

            oldest

            votes









            active

            oldest

            votes






            active

            oldest

            votes









            5














            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
              7 hours ago






            • 1





              Might be worth crediting the image author for completeness

              – Swifty
              2 hours ago











            • @Swifty Thanks!

              – David D
              18 mins ago
















            5














            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
              7 hours ago






            • 1





              Might be worth crediting the image author for completeness

              – Swifty
              2 hours ago











            • @Swifty Thanks!

              – David D
              18 mins ago














            5












            5








            5







            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 18 mins ago

























            answered 9 hours ago









            David DDavid D

            2,648214




            2,648214













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

              – Tom Rhodes
              7 hours ago






            • 1





              Might be worth crediting the image author for completeness

              – Swifty
              2 hours ago











            • @Swifty Thanks!

              – David D
              18 mins ago



















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

              – Tom Rhodes
              7 hours ago






            • 1





              Might be worth crediting the image author for completeness

              – Swifty
              2 hours ago











            • @Swifty Thanks!

              – David D
              18 mins ago

















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

            – Tom Rhodes
            7 hours ago





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

            – Tom Rhodes
            7 hours ago




            1




            1





            Might be worth crediting the image author for completeness

            – Swifty
            2 hours ago





            Might be worth crediting the image author for completeness

            – Swifty
            2 hours ago













            @Swifty Thanks!

            – David D
            18 mins ago





            @Swifty Thanks!

            – David D
            18 mins ago











            4














            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




























              4














              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


























                4












                4








                4







                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 7 hours ago









                SwiftySwifty

                4,0631831




                4,0631831






























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