I am looking into swapping my Cinelli Grammo for a Merlin, 3TTT, ITM Krystal or Ibis stem.
The reason is that I find the Grammo too flexy even though I love the way it looks.
Anyone know if the others mentioned are stiffer? Could this be my bars rather than stem? (Cinelli Eubios 42cm)
Yes I am aware Al or Steel would/could be much stiffer, looking to stick with Ti.
If anyone has a stem mentioned above I am interested.
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I have a problem flexy combo a 3ttt alien stem 135mm and a deda 215 46cm bar. Now that has flex.
I am well aware that flex does not influence power transmission. More of an aesthetic/comfort side of things...
It is a personal preference and I am absolutely aware of that. I much prefer stiff. My opinion is that from a biomechanical perspective my confidence in my bike is much higher when I can get out of saddle and sprint feeling absolutely no deviation in the frame or bars, which translates into more focus and better performance (again, not due to an increase in power transmission, simply from a mental/focus perspective). Stiffness allows me to focus on stuff other than being surprised by how much things are bending...
In that case, would upgrading to carbon bars with a comparable or same diameter increase stiffness? I would assume so, just checking.
Fuji SL 1.1 http://weightweenies.starbike.com/forum/viewtopic.php?f=10&t=140134&hilit=Fuji
provo wrote:Seven looks really nice, must be quill stem though unfortunately. I will look into Moots, although I recall having a hard time identifying any that were 1" steerer size.
you can always get an adapter to put a modern stem on a quill type fork.
- Parlee Altum + DA9150 + Enve SES 4.5 carbon hubs
- Parlee ESX + DA9150 + THM SRM PM + Enve SES 6.7 CK hubs
- Independent Fabrication Ti FLW + DA9100 + Enve 3.4 CK hubs
For looks or you'd take a carbon.
I have 17 stems and of these one is titanium and probably the softest
Ax Lightness Vial EVO D
Paduano Racing Fidia
https://opencycle.com/showcase/the-xplo ... eelsonfire
If someone can convince me that a threadless adapter and a carbon stem is significantly better than a titanium quill stem I am all ears.
provo wrote:Yes I am aware Al or Steel would/could be much stiffer, looking to stick with Ti.
A Nitto threadless adapter generally works as well as a straight threadless setup. Last time I had one it added a few millimeters to stack height (I don't remember precisely how much) but not bad. It isn't obvious once installed. There are some alternatives out there, but the Nitto is probably the strongest. You do add a little weight with the extra piece of hardware but you're saving on the stem so you might make it a wash.
I've had a couple Grammos and they weren't overwhelmingly stiff, but then quill stems tend not to be quite as immobile as threadless anyway. I've seen a few too many Grammos break in use. Overall, there's a lot more sophisticated engineering in most threadless stems than there are in older quill stems. The Eubios bars are stiff but brittle; again, they come from a period when manufacturers were slicing weight and the components got a little easy to crack.
I think you're probably overthinking this a bit. If what you have works, go with it. For a threaded-steer frame, your bike likely looks better with a more classic stem.
I am inexorably a "traditionalist"...
For now another user has kindly offered to sell me an ITM Krystal and I will try that out to see if any increase in stiffness is observable.
Here is another perhaps unanswerable question: the ITM Krystal appears to be constructed quite similarly to the Ibis titanium quill stems I have seen... Does anyone know if the main post of the ITM Krystal is bored out of solid stock as well? Looking at the top, even the quill bolt seat is nearly the same as on the Ibis stems. Is it possible to determine wether a tube (of any metal) was made from bored solid stock or extrusion/roller mold without conducting destructive tests (just curious here from an engineering perspective)? Is there a significant and easily measurable change in elastic deformation between the two?
Thanks for all the input everyone!
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