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carbon bars(10 posts)

carbon barstr
Aug 30, 2001 11:11 AM
Is there any stiffness data out there with respect to the carbon bars? I ask because i don't want to buy one and then find out it is a noodle compared to the itm mill that i am using currently. I am only aware of two carbon bars that have the double grooves.
re: carbon barsMike K
Aug 30, 2001 11:40 AM
I believe that most CF bars are supposed to be stiffer than equal weight aluminum bars (specifically the Easton and Kestrel (sp?) CF bars).
On the other hand, during our a climb on our club ride this Tuesday I was riding along side a guy with an Easton CF bar when it snapped completely right around the face plate of his stem. Pretty freaky - one second we were climbing and bitching about the hill and the next he was off the bike holding the right side of his bar in his hand. Luckily this happened on the way up and not down....
In the bar's defense, he may have over tightened the bar because he had been having problems with the bar turning in the stem (Ritchey).
One the other hand, I have an Easton CT2 carbon bar on one of my MTB's and I have not had any problems with it. It is stiff as hell but it seems to isolate high frequency vibrations better than aluminum bars. Either way, this incident made me pretty leery.
I've got the CT bars on my mtb also...MrCelloBoy
Aug 30, 2001 11:47 AM
with bar ends and no ill effects.
I was wit a guy who snapped an ibis Ti stem at the wld on a road ride.
Super light parts always run a bit of risk for added fragility IMHO.
re: carbon barsIan
Aug 30, 2001 12:01 PM
TR, most bars that have double grooves have aluminum inserts. You might as well stay away from these bars because a high quality aluminum bar will be lighter.

Mike, if you are leery of Easton carbon, check out the way their carbon mountain bars are tested at http://www.eastonbike.com/COMPONENTS/bar_test.html
IanMike K
Aug 30, 2001 12:56 PM
Watching that bar snap the other day is enough to put the fear of god into you. I'm sure that any part can be broken and that one sample does not create a case study for the complete run - and that in general CF bars at the same weight are stronger than al counterparts (I saw the tests before buying my CT2). Its just one of those things (obviously I don't have a problem with CF in general as I do have a CF bar on a bike and almost all of my bikes have CF posts). Trust me, if you ever see a bar snap like that it will go a long way toward not wanting to try one yourself anytime soon...
re: carbon barstr
Aug 30, 2001 3:16 PM
Ian, what about the WR Compositi bar, it is double grooved and they advertise a weight lower than the Reynolds carbon. The other bar i am wondering about is the double grooved stella azzurra road bar.
re: carbon barsIan
Aug 30, 2001 5:57 PM
I was thinking mostly about the Kestrel carbon bar. I can't say that I have ever heard of the WR bar. I am not too familiar with the Stella, but isn't it a $275 bar. At $115 more than the Easton, that is A LOT to pay for grooves.
why double grooves?C-40
Aug 30, 2001 1:56 PM
I've got Easton EC-90 bars with Campy 10 speed. These bars work fine with both cables routed on the front side of the bars. If the cables are positioned correctly, they fall right into the finger joints. They are barely noticeable.
why double grooves?tr
Aug 30, 2001 3:09 PM
It works both ways. Why not? I bet your last aluminum bar had grooves, why not ask the same of the carbon fiber bar manufacturers. We are surely paying for it aren't we! They are not cheap.
why double grooves?Cliff Oates
Aug 30, 2001 3:20 PM
Ergo derailleur cables are usually routed along the outside radius of the bar. The wider radius bend results in less friction and potential for binding of the cable. It is certainly possible to route the cable along the inside bend, it is just not preferred.