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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?
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! :/

headset steerer
add a comment |
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! :/

headset steerer
add a comment |
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! :/

headset steerer
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! :/

headset steerer
headset steerer
edited 7 hours ago
Swifty
4,0631831
4,0631831
asked 9 hours ago
Tom RhodesTom Rhodes
163
163
add a comment |
add a comment |
2 Answers
2
active
oldest
votes
That looks like the compression ring for a threadless headset.

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license
More information found at Sheldon Brown
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
add a comment |
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.
add a comment |
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2 Answers
2
active
oldest
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2 Answers
2
active
oldest
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active
oldest
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active
oldest
votes
That looks like the compression ring for a threadless headset.

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license
More information found at Sheldon Brown
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
add a comment |
That looks like the compression ring for a threadless headset.

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license
More information found at Sheldon Brown
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
add a comment |
That looks like the compression ring for a threadless headset.

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license
More information found at Sheldon Brown
That looks like the compression ring for a threadless headset.

Images by keithonearth on Wikimedia Commons, reproduced under Gnu free documentation license
More information found at Sheldon Brown
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
add a comment |
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
add a comment |
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.
add a comment |
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.
add a comment |
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.
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.
answered 7 hours ago
SwiftySwifty
4,0631831
4,0631831
add a comment |
add a comment |
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