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How do I install this threadless headset so I don't kill myself?

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How do I install this threadless headset so I don't kill myself?

Old 11-28-13, 01:09 AM
  #1  
reggieray
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How do I install this threadless headset so I don't kill myself?

Built a new bike.



Here are the parts of the headset.



When I thread the long bolt into the silver thing that sits inside the steerer tube, it expands (as designed)...but even with the bolt torqued all the way down, I can turn the bars and the front wheel remains unmoved. Is that a problem?

Now, when I tighten the two stem bolts, the wheel turns precisely with the bars.

I don't want the fork falling out of the head tube, resulting in me going to the hospital...again
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Old 11-28-13, 01:13 AM
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Originally Posted by reggieray View Post
Built a new bike.



Here are the parts of the headset.



When I thread the long bolt into the silver thing that sits inside the steerer tube, it expands (as designed)...but even with the bolt torqued all the way down, I can turn the bars and the front wheel remains unmoved. Is that a problem?

Now, when I tighten the two stem bolts, the wheel turns precisely with the bars.

I don't want the fork falling out of the head tube, resulting in me going to the hospital...again
You simply tighten that top bolt until there's no play in the headset, it's basically just preloading it. Then you tighten the stem bolts and like you noticed you'll be good to go. One thing though, you may want to invest in a cheap torque wrench if you want to get OCD about meeting manufactures specs.
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Old 11-28-13, 11:07 AM
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Originally Posted by fietsbob View Post
Ever bike you had before is a threaded headset and Quill stem, I suppose..

You have not understood how a treadless fork works

top cap is just adjusting the bearing pre load , the pinch bolts on the back of the stem, both secures that adjustment,
and grips the steerer tube so the bars turn the wheel ...
Isn't that pretty much what I said?
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Old 11-28-13, 11:16 AM
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so you get to feel so thankful for your intellect , child, learning this simple stuff, and how to write,
I deleted my post
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Old 11-28-13, 11:19 AM
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Originally Posted by fietsbob View Post
so you get to feel so thankful for your intellect , child, learning this simple stuff, and how to write,
I deleted my post
More like thankful to you and the guys like you for putting the info out there for me to learn from and then help others down the road Happy thanksgiving Bob!
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Old 11-28-13, 11:19 AM
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Just in case this is the issue, make sure you have the right amount of spacers so that the bearing preload can be adjusted properly.

http://www.parktool.com/blog/repair-...ice#adjustment

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Old 11-28-13, 11:55 AM
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Good place to start. http://www.parktool.com/blog/repair-help
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Old 11-28-13, 09:04 PM
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The OP shows a fundamental lack of understanding about how these work.

In this case, the functions of clamping the bars to the steerer and adjusting the headset are separated. Everything flows from this basic concept.

So the top cap screw is used to force the outer stack down to compress and adjust the bearing, then the bar is clamped to keep the adjustment, and secure the handlebar fork orientation.

IMO the OP should review a few tutorials and study his own bike until it all comes together in his head. Then he can get down to the details of the actual adjustment.

Approaching problems from the general concept before the specific details is how people can have confidence in their own work. Otherwise they're just following a bunch of steps, but have no way to know for sure that they've done the job right.
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