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PostPosted: Tue Jun 19, 2018 7:34 pm 
Retro Guru
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Joined: Thu Apr 30, 2009 9:47 pm
Posts: 880
Location: Newbury, Berkshire
The History Man wrote:
Aheadset with steerer extender ? Threadless 1 1/8.


Cheers THM, I didn't know that such a device existed - every day's a learning day!

Pip.


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PostPosted: Tue Jun 19, 2018 8:15 pm 
GOLD | PoTM | Rider | rBOTM
GOLD | PoTM | Rider | rBOTM
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Joined: Tue Feb 26, 2013 6:26 pm
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Location: 54 Festive Road Winchcombe GLOUCS Yarp...
pipmeister wrote:
The History Man wrote:
Aheadset with steerer extender ? Threadless 1 1/8.


Cheers THM, I didn't know that such a device existed - every day's a learning day!

Pip.

Not a problem. Hope you're doing well.


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 Post subject: Re: Re:
PostPosted: Tue Jun 19, 2018 9:23 pm 
Dirt Disciple
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Joined: Tue Jun 24, 2014 1:13 pm
Posts: 98
Location: London
pipmeister wrote:
Ugo51 wrote:
Image


This is the current setup.

The top cap is a threaded cap that screws onto the extension tube, which is why I thought all top caps were threaded.


Whoa :shock: that is some set-up! There is a lot going on there. I am struggling to figure out what you have on your bike. If that lower collar with a pinch bolt is the Headset bearing adjuster, then I assume that you have Threaded Headset with a Threadless conversion. Your Top Cap seems to be an integral bolt type, which I assume is pulling on the Quill sliding "Nut".

I would start again with either a Threaded / Quill set-up if your Steerer is Threaded, or if your Steerer is actually Threadless, fit the simpler Threadless set-up that utilities a Top Cap like the example in my picture.

I'm probably not helping you a great deal with a solution, but perhaps THM can figure out what is going on with that unusual set-up.

Pip.



I have to admit I have difficulties understanding what you wrote :D
I am a total novice when it comes to bike jargon, so no idea what a quill is.
Anyway, the stem is threadless. I have no idea why there is a collar, I think it's just there to be a spacer, but correct me if I'm wrong and you think it's there for a reason.

It's clear the previous owner wanted a higher handle bar and it looks to me it shoved all the spacers he had onto the stem and, when it was not enough, he added the extension tube.

So, going back to my original question, the top cap - a real top cap not the bolt-less top cap I have now - should just fit onto the stem, and host the nut that pulls on the star nut, right?

At the moment the star nut is tightened through a bolt housed in the extension tube.
The plan is to simplify this setup, although I don't want to go too low because I use the bike for commuting and I need it to be fairly comfortable.


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 Post subject: Re:
PostPosted: Tue Jun 19, 2018 10:04 pm 
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Joined: Thu Apr 30, 2009 9:47 pm
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Location: Newbury, Berkshire
As I said in my 3rd post,
"I would start again........ if your Steerer is actually Threadless, fit the simpler Threadless set-up that utilities a Top Cap like the example in my picture."

THM suggested the same, but put it rather better than I did,
"......Take it all off and get a high rise stem and normal type shallower unthreaded cap held by the central bolt. There should be a star nut in the steerer tube that this tightens down onto to prevent a loose headset before tightening the stem (two Allen bolts) onto the steerer. "

Removing those flat bars and fitting a pair of riser bars will also help if your concerned about bar high.

Pip.


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 Post subject: Re:
PostPosted: Thu Jun 21, 2018 7:43 am 
Dirt Disciple
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Joined: Tue Jun 24, 2014 1:13 pm
Posts: 98
Location: London
I will try and remove gradually the spacers and the extension tube to see what height I feel comfortable with.

I'll the decide the set-up. For the moment is good to know that I can just buy a 1 1/8 top cap and fit it.
I just need to decide what to take. Ideally something cool, cheap and in line with be bike style.
Mission impossible:)


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