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PostPosted: Mon Dec 31, 2007 3:28 am 
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MachineTech ''Open'' Ahead stem

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Last edited by Mr. Zero on Thu Jan 03, 2008 4:23 pm, edited 2 times in total.

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PostPosted: Mon Dec 31, 2007 11:33 am 
Concours Judge
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Hi,

Nice 8)

They were std equipment on the 96&97MY Koga SkyExpension. In their brochure it was simply called MachineTech ''Open'' Ahead...


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PostPosted: Mon Dec 31, 2007 4:13 pm 
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Excellent! Thanks Elev12k. :)


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PostPosted: Tue Jan 01, 2008 9:34 pm 
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I have one of those somewhere. It's missing that aluminium (?) insert where the head tube enters the stem.

Can you give me the dimensions for that piece - I think i might see if I can get one machined.

Length & wall thickness should suffice.

Just let me kow if you measured by eye, trusty tape measure, calipers or micrometer :D


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PostPosted: Wed Jan 02, 2008 10:44 pm 
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I have a prototype version of that, it clamps onto the steerer at the back with a pair of bolts, doesnt look as slick as that one...

and the ally extension bit is just a 1" to 1 1/8" shim is it not? it is on mine anyhoo...

Ta, theboy


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PostPosted: Wed Jan 02, 2008 11:57 pm 
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Ah, I assumed it was part of the stem

Can someone post a pic of the bolt that does the clamping duties to the steerer tube. I had a look earlier & I'm missing that bit as well.

Cheers


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PostPosted: Thu Jan 03, 2008 1:52 am 
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Crell wrote:
I have one of those somewhere. It's missing that aluminium (?) insert where the head tube enters the stem.

Can you give me the dimensions for that piece - I think i might see if I can get one machined.

Length & wall thickness should suffice.

Just let me kow if you measured by eye, trusty tape measure, calipers or micrometer :D


This should do it:

Image

Image

Image


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PostPosted: Thu Jan 03, 2008 4:29 pm 
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theboy wrote:
I have a prototype version of that, it clamps onto the steerer at the back with a pair of bolts, doesnt look as slick as that one...


Like this one? Looks pretty slick IMHO:

Image


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PostPosted: Thu Jan 03, 2008 5:09 pm 
B.o.T.M. Winner / Feature Bike
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Crell wrote:
Ah, I assumed it was part of the stem



I think you do need to use it due to the shape of the stem. Bottom of the stem needs to sit flush to the headset/spacers, but the bottom of the stem is all curvy meaning that it won't unless you use the shim type thing, or am I wrong?


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PostPosted: Thu Jan 03, 2008 5:20 pm 
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pete_mcc wrote:
think you do need to use it due to the shape of the stem. Bottom of the stem needs to sit flush to the headset/spacers, but the bottom of the stem is all curvy meaning that it won't unless you use the shim type thing, or am I wrong?


You're exactly right. It is essentially a headset spacer integral to the stem design so it will sit flush to the headset.


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