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PostPosted: Wed Dec 13, 2006 11:00 am 
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Joined: Thu Sep 15, 2005 10:19 am
Posts: 784
Location: Greece
Has anyone tried the new TUNE GumGUM and the carbon ahead cap?
It is a very light headset expander (9 gr for the expander and 5gr for the cap incl. bolt). (So I am looking at a weight saving of 23gr)
Will it support sufficiently the walls of a carbon steerer?
Would the schmolke carbon ahead cap be a better idea?


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 Post subject:
PostPosted: Wed Dec 13, 2006 11:13 am 
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Joined: Sat Sep 23, 2006 1:10 pm
Posts: 20
Location: Heidelberg, Germany
The Smolke ahead cap would definitely be the better choice. When you torque the stem the expander has no function anymore – you just need it once setting up the bearing clearance. You can remove and replace it by the ahead cap which comes in at 5 g for € 24.


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PostPosted: Wed Dec 13, 2006 12:57 pm 
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Joined: Tue Jun 22, 2004 9:56 am
Posts: 109
Location: Germany
I use it in combination with a easton ec90 and it works quite fine but i had to reduce the diameter of the gum to make it fit.


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 Post subject:
PostPosted: Wed Dec 13, 2006 2:24 pm 
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AKA "The Nils"!

Joined: Mon May 31, 2004 11:01 pm
Posts: 1068
Location: Germany
Regards the Schmolke Ahead-Deckel: although it is said that an expander would only be needed to initially adjust the headset play and would then render useless I have made a little difference experience.
With a flexy steerer (THM Scapula SP) my headset came loose after every hard ride over rough surface - once I installed a tiny expander & ahead cap with alloy bolt (so definitely nothing to take high loads) everything was fine and I have been able to ride for 1000s of miles without having to readjust the headset only once. So to me the combination expander + ahead cap is much more convenient than the Ahead-Deckel, especially as it keeps you from being stranded in the middle of nowhere without being able to do any adjustments.

As for the Tune Gum Gum: the real weight really comes down to 9g. In combination with Tune's Carbon-Cap and alloy bolt (5g) you are looking into a weight of 14g vs. 5g of a Schmolke Ahead-Deckel.


Attachments:
Schmolke Carbon Ahead Deckel (5g).jpg
Schmolke Carbon Ahead Deckel (5g).jpg [ 71.09 KiB | Viewed 5401 times ]
Tune Carbon-Cap - 6 - weight (5g incl. bolt).jpg
Tune Carbon-Cap - 6 - weight (5g incl. bolt).jpg [ 69.42 KiB | Viewed 5380 times ]
Tune Carbon-Cap - 4 - cap & alu bolt.jpg
Tune Carbon-Cap - 4 - cap & alu bolt.jpg [ 96.97 KiB | Viewed 5353 times ]
Tune Gum Gum - 5 - weight (9g).jpg
Tune Gum Gum - 5 - weight (9g).jpg [ 68.86 KiB | Viewed 5451 times ]
Tune Gum Gum - 4 - unpacked.jpg
Tune Gum Gum - 4 - unpacked.jpg [ 95.9 KiB | Viewed 5332 times ]
Tune Gum Gum - 3 - package rear.jpg
Tune Gum Gum - 3 - package rear.jpg [ 91.63 KiB | Viewed 5230 times ]
Tune Gum Gum - 2 - package front.jpg
Tune Gum Gum - 2 - package front.jpg [ 92.86 KiB | Viewed 5347 times ]

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 Post subject:
PostPosted: Wed Dec 13, 2006 3:32 pm 
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Joined: Thu Sep 15, 2005 10:19 am
Posts: 784
Location: Greece
pk0r wrote:
As for the Tune Gum Gum: the real weight really comes down to 9g. In combination with Tune's Carbon-Cap and alloy bolt (5g) you are looking into a weight of 14g vs. 5g of a Schmolke Ahead-Deckel.


I know, it was your post at FWB forum that I took the actual weights from. :lol:


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 Post subject:
PostPosted: Thu Dec 14, 2006 7:11 am 
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Joined: Mon Oct 04, 2004 10:10 am
Posts: 321
Location: London (then Tokyo, now Singapore)
Anyone know were to buy these ? Look on the Tune web site but nothing. Why is it that Tune has loads of great stuff that never makes it to the web site ? Madness.


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 Post subject:
PostPosted: Thu Dec 14, 2006 7:54 am 
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Joined: Mon May 12, 2003 11:21 am
Posts: 55
Location: Slovak rep.
Halo,
This specifications i found by website
Wieder ein neues Teil aus Britzingen: GumGum, eine schonende Klemmvorrichtung aus Silikongummi. Für Steuerrohr- Innendurchmesser von 24 bis 25,5 mm geeignet, insbesondere empfindlicher Carbongabelschäfte. Die Klemmung selbst besteht aus einem sogenannten NBR-Ring (schwarz), einem Trennplättchen, dem eigentlichen Silikonring und einer Gewindeplatte. Gesamtgewicht ganze 7 Gramm! Der empfohlene Verkaufspreis liegt bei 12 Euro.

Beim Justieren des Steuersatzes drückt sich das Silikongummi zusammen und wird dadurch an den Gabelschaft gepresst, bei Umbaumaßnahmen wiederum ist die Klemmung ganz leicht zu entfernen.
Die Klemmvorrichtung ist seit dieser Woche (KW43) lieferbar und wird ab sofort den aktuellen Tune- Steuersätzen Bubu und Bobo beigelegt.

http://www.leichtbau-konfigurator.de/we ... p?tag=tune


Attachments:
gumgum_21.jpg
gumgum_21.jpg [ 15.36 KiB | Viewed 5247 times ]
gumgum_11.jpg
gumgum_11.jpg [ 16.43 KiB | Viewed 5261 times ]
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 Post subject:
PostPosted: Thu Dec 14, 2006 8:41 am 
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Joined: Thu Sep 15, 2005 10:19 am
Posts: 784
Location: Greece
Carbonman wrote:
Anyone know were to buy these ? Look on the Tune web site but nothing. Why is it that Tune has loads of great stuff that never makes it to the web site ? Madness.


http://www2.hibike.com/main.php?session ... groupID=23

and for the cap:

http://www2.hibike.com/main.php?session ... groupID=22


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 Post subject:
PostPosted: Thu Dec 14, 2006 9:07 am 
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Joined: Sun Oct 16, 2005 8:46 pm
Posts: 965
Location: Swansea, Wales, United Kingdom
pk0r, thanks for a very informative post!


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PostPosted: Wed Jan 03, 2007 2:37 pm 
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Joined: Sun Oct 16, 2005 8:46 pm
Posts: 965
Location: Swansea, Wales, United Kingdom
Taz wrote:
Has anyone tried the new TUNE GumGUM and the carbon ahead cap?
It is a very light headset expander (9 gr for the expander and 5gr for the cap incl. bolt). (So I am looking at a weight saving of 23gr)
Will it support sufficiently the walls of a carbon steerer?
Would the schmolke carbon ahead cap be a better idea?


Just installed the Tune Gum Gum and Head Cap. Easy to install, looks great and appears to work. It won't get a proper work out until March though! I'll hang on to my USE expander for now...


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 Post subject:
PostPosted: Wed Jan 03, 2007 3:04 pm 
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Joined: Sat Oct 21, 2006 4:54 am
Posts: 313
Location: Utah
These are pretty good also.
TOKEN ULTRA Lite Fork Expander (18 grams)
$12.95 eBay Buy it now price:
Image


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 Post subject:
PostPosted: Wed Jan 03, 2007 3:16 pm 
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Joined: Sun Oct 16, 2005 8:46 pm
Posts: 965
Location: Swansea, Wales, United Kingdom
Strong Bad wrote:
These are pretty good also.
TOKEN ULTRA Lite Fork Expander (18 grams)
$12.95 eBay Buy it now price:
Image


Tried it, couldn't get it to work.


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 Post subject:
PostPosted: Wed Jan 03, 2007 9:04 pm 
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Joined: Fri Sep 15, 2006 9:20 pm
Posts: 261
Location: California, USA
Have you considered the Extralite Ultrastar. I've had good results.

Have a look at this post: http://weightweenies.starbike.com/forum ... highlight=

Good luck.

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 Post subject:
PostPosted: Wed Jan 03, 2007 11:22 pm 
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Joined: Sun Jun 11, 2006 9:01 pm
Posts: 275
geraintnorman wrote:
Strong Bad wrote:
These are pretty good also.
TOKEN ULTRA Lite Fork Expander (18 grams)
$12.95 eBay Buy it now price:
Image


Tried it, couldn't get it to work.


Ditto.

I ended up using the Extralite Ultrastar.


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 Post subject:
PostPosted: Thu Jan 04, 2007 4:23 am 
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Joined: Sat Oct 21, 2006 4:54 am
Posts: 313
Location: Utah
Quote:
Tried it, couldn't get it to work.


Strange, worked with no problem for me.


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