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PostPosted: Sat Mar 01, 2014 3:52 am 
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Joined: Sun Sep 11, 2005 11:32 pm
Posts: 224
Location: san francisco ca. usa
Great test and appreciate the work everyone at FWB puts into it. I prefer a stiff stem but I'm not sure that I can tell if any of my stems flex. I don't feel any flex, even with my 56.5 gram stem which is 105 mm. long


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PostPosted: Sat Mar 01, 2014 3:53 am 
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in the industry

Joined: Fri Dec 07, 2012 8:34 pm
Posts: 280
Location: North Carolina
the test shows that the Vibe is clearly a super stiff stem. It just suffers in the S:W ratio because of the extra mass it has.

Kittel's stem is a modified Pro Vibe stem (maybe the PLT Stem with modified steerer clamp diameter) made specifically for Giant the 1-1/4" steerer with a more standard 4 bolt face plate, as opposed to the puzzle system on the standard vibe.

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PostPosted: Sat Mar 01, 2014 4:36 am 
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Joined: Tue Sep 11, 2007 4:20 pm
Posts: 584
Location: Tokyo
@madcow,

Would like to suggest a test on Ritchey C260 "Superlogic" full carbon stem.

Image


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PostPosted: Sat Mar 01, 2014 11:40 am 
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Joined: Fri Dec 06, 2013 9:08 am
Posts: 295
Location: Slovakia
@LouisN, thanks. No way I am going to toss it because of the test. :) But it was interesting to learn something about it. There is also nice sum up about Pro Vibe on before the test results.


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PostPosted: Sat Mar 01, 2014 12:41 pm 
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Joined: Sat Feb 23, 2008 6:33 pm
Posts: 282
I'm surprised the Deda 0-100 and Trentacinque 35 were not tested.


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PostPosted: Sat Mar 01, 2014 1:51 pm 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 1529
Location: Vienna Austria
The Kalloy Uno 7 would also be an interesting candidate, it is so popular here that it has its own thread. I wouldn't be surprised if it tested very similar to the New Ultimate (since it looks a lot like it), it would just smash it in a stiffness/weight/price ranking :-)

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godzuki26 wrote:
She is not allowed to run spacers under the stem. It must look good. It must be slammed. She does Yoga and Crossfit so she is getting into a pro position whether she likes it or not. Lol. She thinks cycling is easy. She needs to be schooled.


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PostPosted: Sat Mar 01, 2014 5:51 pm 
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Joined: Sat Nov 29, 2008 6:15 am
Posts: 743
Location: Colorado
Interesting note about the syntace f119 not being offered in 110mm as I have three of them as well as a few 105mm 's. ;)

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PostPosted: Sat Mar 01, 2014 8:37 pm 
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Joined: Sun Jan 05, 2014 9:47 am
Posts: 42
madcow wrote:
...If anyone has suggestions for other stems they'd like to see tested in round 2 please feel free to mention them...

This sounds like the perfect opportunity to prove - with (ostensibly) scientific objectivity - whether or not all the scare-mongering about so-called "low quality" Chinese replica carbon stems has any scientifically-proven basis.

Is there any reason why your tests don't include a single "knock-off" Chinese carbon stem? Of course, there is no inherent anti-bias against them on the tester's part! And there's certainly no conflict of interest in regard to any undisclosed relationship between an authorized dealer and the makers of some of the name-brand stems on test! Perish the thought! Right?

In my opinion, any test claiming to be 100% unbiased would be remiss if they didn't include any "placebos" in their test.

I vote for including in the next round some replica Chinese carbon stems for side-by-side comparisons to their "high-quality" name-brand counterparts.

I'll even volunteer my services to help you source some of the reverse-engineered stems:


And so as not to offend any of the goody-two-shoes Junior G-Men on the Homeland Security's IPR-Enforcement Task Force lurking amongst us:


Oh! I almost forgot about handlebars:



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PostPosted: Sat Mar 01, 2014 9:19 pm 
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Joined: Mon Jun 02, 2003 8:17 am
Posts: 6361
Location: Drenthe, Holland
Great test! thanks Jason.

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PostPosted: Sat Mar 01, 2014 11:12 pm 
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Joined: Fri Nov 16, 2012 4:09 pm
Posts: 30
Food for thought, the time and energy spent on this is greatly appreciated.


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PostPosted: Sun Mar 02, 2014 5:42 am 
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Joined: Wed Jun 08, 2011 6:08 am
Posts: 571
Lighter aluminum stems are more flexible than heavier ones. Nothing new there.

They deflect up to 5mm in your test. How is that data useful to us? Is 5mm of flex something we should care about? Does this show durability to be a concern with the lighter stems?


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PostPosted: Sun Mar 02, 2014 5:44 am 
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Joined: Tue Feb 11, 2014 11:47 pm
Posts: 187
Location: Boganville, Australia
Makes me feel better about the ENVE stem I just purchased.

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PostPosted: Sun Mar 02, 2014 11:24 am 
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Joined: Wed Jan 22, 2014 11:48 am
Posts: 1529
Location: Vienna Austria
F45 wrote:
They deflect up to 5mm in your test. How is that data useful to us? Is 5mm of flex something we should care about? Does this show durability to be a concern with the lighter stems?


You decide! :D

_________________
godzuki26 wrote:
She is not allowed to run spacers under the stem. It must look good. It must be slammed. She does Yoga and Crossfit so she is getting into a pro position whether she likes it or not. Lol. She thinks cycling is easy. She needs to be schooled.


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PostPosted: Sun Mar 02, 2014 11:48 am 
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in the industry
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Joined: Sun Nov 21, 2004 2:45 pm
Posts: 2898
Location: London, UK
velonista wrote:
madcow wrote:
...If anyone has suggestions for other stems they'd like to see tested in round 2 please feel free to mention them...

This sounds like the perfect opportunity to prove - with (ostensibly) scientific objectivity - whether or not all the scare-mongering about so-called "low quality" Chinese replica carbon stems has any scientifically-proven basis.

Is there any reason why your tests don't include a single "knock-off" Chinese carbon stem? Of course, there is no inherent anti-bias against them on the tester's part! And there's certainly no conflict of interest in regard to any undisclosed relationship between an authorized dealer and the makers of some of the name-brand stems on test! Perish the thought! Right?

In my opinion, any test claiming to be 100% unbiased would be remiss if they didn't include any "placebos" in their test.

I vote for including in the next round some replica Chinese carbon stems for side-by-side comparisons to their "high-quality" name-brand counterparts.

I'll even volunteer my services to help you source some of the reverse-engineered stems:


And so as not to offend any of the goody-two-shoes Junior G-Men on the Homeland Security's IPR-Enforcement Task Force lurking amongst us:


Oh! I almost forgot about handlebars:


Simple really. Reverse Engineered is not what they are. Fake or knock-off, take your pick. Testing them would undermine their position as a legitimate dealer. Can you imagine the effect of an authorised dealer including fake versions of their supplier's product?


Sent from my iPad using Tapatalk


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PostPosted: Sun Mar 02, 2014 4:16 pm 
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Joined: Sun Jan 05, 2014 9:47 am
Posts: 42
ultimobici wrote:
...Fake or knock-off, take your pick...

I pick "placebo". Because - like their pharmaceutical counterparts - they defy scientific explanation, but there's no denying they work just as effectively as anything you care to compare them to.

ultimobici wrote:
...Can you imagine the effect of an authorised dealer including fake versions of their supplier's product?...

I guess you missed this:
velonista wrote:
...
And so as not to offend any of the goody-two-shoes Junior G-Men on the Homeland Security's IPR-Enforcement Task Force lurking amongst us:

...


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