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PostPosted: Sun Jul 27, 2008 6:36 am 
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Location: Santa Barbara, CA
looking into a low stack non-integrated headset and my options thus so far are the Extralite Head 2 and the Crank Brothers Directset. I have had the Extralite Head 2 before but sold it recently due to a different build but now i need it again for another build--sound familiar :)
--no one seems to have one right now so i am thinking about the directset. Only problem i heard so far is that they are very hard to align with the Park shop tool and thus the steel lip breaks as you add pressure to get the cups in. I was thinking to install these cups one at a time and i do have the Park shop tool. Any other low stack non-integrated headsets out there??


Last edited by Gold Knight on Sun Jul 27, 2008 5:10 pm, edited 1 time in total.

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Posted: Sun Jul 27, 2008 6:36 am 


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PostPosted: Sun Jul 27, 2008 10:25 am 
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Gold Knight wrote:
Any other low stack non-integrated headsets out there??


There's also Acros AH-01, with a total stack height of 23,4 mm: http://www.acros.de/acros/02_products/0 ... php?show=2

Crank Borthers directsets has a total stack height of 20,56 mm: http://www.crankbrothers.com/directsets_cobaltti.php

Extralite The Head 2 has a stack height of 20.5 mm: http://www.extralite.com/Products/thehead_anglo.htm

In the US, Madcow (Fairwheel Bikes) sell Syncros headsets besides Extralite, Chris King and Tune. Although the AH-01 doesn't seem to be listed at his webshop, but try to PM him, he might be able to get it for you: http://fairwheelbikes.com/index.php?mai ... x&cPath=15

Acros AH-01 Ceramic and AH-06 was recently tested in the German MTB magazine "Bike": http://www.acros.de/downloads/acros/pre ... _05_08.pdf

There's already another topic about low stack height headsets: http://weightweenies.starbike.com/forum ... hp?t=20376
madcow wrote:
Stack heights of headsets, remember not all are split evenly top and bottom. These are the smallest I can think of at the moment.


Record. 24.5
King 31.4
Ritchey 27
Tioga 25.5
Extralite 20.5

A few years ago, there was a company called Star that made some incredibly tiny headsets. I believe the stack height on them was around 16mm, perhaps you can find one of those on ebay, since the company is no longer around.


Last edited by 2 wheels on Sun Jul 27, 2008 3:49 pm, edited 1 time in total.

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PostPosted: Sun Jul 27, 2008 1:54 pm 
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Location: Mountain View, California
Tune BoBo

http://www.starbike.com/php/product_inf ... n&pid=2668


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PostPosted: Sun Jul 27, 2008 2:54 pm 
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Location: Santa Barbara, CA
thanks for the replys
so my choices are:

Extralite Head 2 20.5
Tune BoBo 24.6
Acros AH-01 ceramic 23.4

(decided not to do the directset route)

guess i will pm MadCow to get me whichever he can get first


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PostPosted: Sun Jul 27, 2008 3:46 pm 
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You can also get a standard version of Acros AH-01 without ceramic bearings, it will probably be much cheaper.

Ceramic bearings might last longer, but for a road bike I don't think it really matters.


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PostPosted: Sun Jul 27, 2008 3:51 pm 
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Location: Santa Barbara, CA
but my new Z1SL deserves the best--whats $400 for a headset anyway! IF AVAILABLE like the others--where to find it in the US?


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PostPosted: Sun Jul 27, 2008 5:02 pm 
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Actually there's 3 types of Acros AH-01 headsets:
http://www.bikeradar.com/road/news/arti ... kets-16953
http://www.balfa.co.uk/catalog/index.php?cPath=33_31
Acros AH-01 Stainless Headset - NEW FOR 2008 £69.99
Acros AH-01 Ceramic Headset - NEW FOR 2008 £99.99
Acros AH-01 Ceramic Ultimate Headset - New for 2008 £399.99

The Ultimate headset has full ceramic upper bearing, while the regular ceramic headset "only has ceramic hybrid bearing.


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PostPosted: Sun Jul 27, 2008 5:10 pm 
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Location: Santa Barbara, CA
well after doing my measurements the THM fork i have has 190mm of steerer on it so:

frame has 140mm
stem Extralite UL3 has 40mm

so i have 10mm left-- :(

it will be a tight squeeze so i am limited to the Extralite Head 2 i think


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PostPosted: Sun Jul 27, 2008 5:34 pm 
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And/or get another stem with a lower stack height.
FSA OS-99 and OS-115 for example only has 35mm stack height compared to the 40mm stack height of Extralite stems.
http://fullspeedahead.com/fly.aspx?layo ... 13&pid=199


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PostPosted: Sun Jul 27, 2008 5:46 pm 
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Location: Santa Barbara, CA
running 128gram Schmolke TLO bar 26.0!


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PostPosted: Sun Jul 27, 2008 6:11 pm 
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Location: SC, USA
Since you don't have an integrated HS, you might be able to shave the HT down a few mms. It depends on the frame. If it's carbon you might be SOL.

If you can find one, I believe the m2 race HS had a very small stack. Can't say I'd use that HS, but it does exist.

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PostPosted: Sun Jul 27, 2008 6:20 pm 
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it is a brand new Parlee Z1SL so i don't really want to harm this frame!


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PostPosted: Mon Jul 28, 2008 6:47 pm 
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Gold Knight wrote:
well after doing my measurements the THM fork i have has 190mm of steerer on it so:

frame has 140mm
stem Extralite UL3 has 40mm

so i have 10mm left-- :(

it will be a tight squeeze so i am limited to the Extralite Head 2 i think


Am I missing something?

140mm head tube + 40mm stem + 20mm headset = 200mm

THM fork = 190mm

Your stem will overhang the top of the fork by 10mm? I thought the limit was 3-4mm...


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Posted: Mon Jul 28, 2008 6:47 pm 


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PostPosted: Mon Jul 28, 2008 7:13 pm 
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Location: Santa Barbara, CA
yep--you are correct!! wanna buy a THM Scalpula SP tuned 190mm!!!

i will try to get the Edge 1.0 --cannot wait for 1/2 year for another Scalpula SP


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