HOT: Active* forum members generally gain 5% discount at starbike.com store!
Weight Weenies
* FAQ    * Search    * Trending Topics
* Login   * Register
HOME Listings Blog NEW Articles FAQ Contact About




Post new topic Reply to topic  [ 27 posts ] 
Go to page 1, 2  Next
Author Message
PostPosted: Mon Nov 25, 2013 11:01 am 
Offline

Joined: Fri Nov 22, 2013 12:04 pm
Posts: 22
Hi there

i was recently advised by a very knowledgeable source that if you are over 70kg in weight you should not use carbon bars as they will fail at somepoint?

Anyone know any different

I am 90kg in weight


Top
 Profile  
 
Posted: Mon Nov 25, 2013 11:01 am 


Top
  
 
PostPosted: Mon Nov 25, 2013 11:12 am 
Offline
Administrator
User avatar

Joined: Sat Jun 19, 2004 11:08 am
Posts: 6291
Location: Urbana, Illinois
I think I would go with the manufacturers set weight limit. They would not recommend a weight that would be okay knowing that there is a possibility of failure. I weigh 72 kg and have been on the same 173 gram Zipp SL carbon bars for over 7 years.

_________________
RESIDENT GRUMPY OLD MAN.


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 11:23 am 
Offline

Joined: Fri Nov 22, 2013 12:04 pm
Posts: 22
thanks for the reply

the bars are Deda Superleggero but Deda do not provide any weight limits


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 1:35 pm 
Offline

Joined: Sun Oct 05, 2008 8:09 pm
Posts: 1062
Location: Aix en Provence
84kg using the superleggero.


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 1:39 pm 
Offline

Joined: Fri Nov 22, 2013 12:04 pm
Posts: 22
thanks - and previously had you used carbon bars?

are you using the stem to?


Last edited by Frankie - B on Mon Nov 25, 2013 7:19 pm, edited 1 time in total.
deleted the quote. this is a reply. thanks.


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 1:42 pm 
Offline

Joined: Sun Oct 05, 2008 8:09 pm
Posts: 1062
Location: Aix en Provence
I use the stem as well on one bike.

I am also using on other bikes ritchey carbon curve (on 2 bikes) and FSA compact carbon.


Last edited by Frankie - B on Mon Nov 25, 2013 7:19 pm, edited 1 time in total.
deleted the quoted quote as this is a reply. thanks


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 4:08 pm 
Offline

Joined: Thu Mar 08, 2012 11:43 pm
Posts: 573
GregSherwin wrote:
Hi there

i was recently advised by a very knowledgeable source that if you are over 70kg in weight you should not use carbon bars as they will fail at somepoint?


That's ridiculous. 70kg is 11st. That's not very heavy by any standards (except perhaps for jockeys). Think about the average weight of the MAMIL who can afford to spend a couple hundred bucks on a handlebar. If 70kg was a sensible limit these things would be out there failing under normal use every day.


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 4:30 pm 
Offline

Joined: Sat Apr 18, 2009 8:59 am
Posts: 568
Location: Surrey UK
I'm on the heavy weight site +90kg and have been using two 180g bars. On my mtb bike I've got 83g bar. Never experienced a failure. But when something goes wrong don't quote me on this ;)

_________________
Cervelo R5 VWD 5637g/12.43lb
Pronghorn XC SW Race 8284g/18.26lb


Top
 Profile  
 
PostPosted: Mon Nov 25, 2013 4:45 pm 
Offline

Joined: Fri May 25, 2007 6:43 pm
Posts: 2073
GregSherwin wrote:
i was recently advised by a very knowledgeable source that if you are over 70kg in weight you should not use carbon bars as they will fail at somepoint?
I'd find a better knowledgeable source, yours sounds like a bit of a pillock.

At a given weight, carbon bars *should* be stronger and more durable.
And IIRC one manufacturer (Easton i think?) used to recommend changing their lightest aluminium MTB bars yearly, their (even lighter) carbon bar initially had no recommendation, then i think went to 3 years.

Only downside to carbon bars is that they are so exposed if you crash, and after a big slidy off, i'll usually replace the bars as a matter of course. And a €50 aluminium bar hurts the wallet a lot less than a €200 carbon one. (Plus the fact that you tend not to save huge amounts of weight, compared to dropping €150 on something else shiny!)

Disclaimer.- if you buy cheap nasty carbon bars, you're on your own.


Top
 Profile  
 
PostPosted: Tue Nov 26, 2013 3:25 am 
Offline
User avatar

Joined: Thu Aug 25, 2005 7:09 pm
Posts: 1227
Location: In the industry
Well, then he isn't very knowledgeable. Carbon has been used to handle tasks that involve weights far beyond human body weight. Just a matter of how you make it.

GregSherwin wrote:
Hi there

i was recently advised by a very knowledgeable source that if you are over 70kg in weight you should not use carbon bars as they will fail at somepoint?

Anyone know any different

I am 90kg in weight

_________________
Fast falcons: http://www.youtube.com/watch?v=j3mTPEuFcWk" onclick="window.open(this.href);return false;
www.falcobike.com
Facebook: falcobikeglobal


Top
 Profile  
 
PostPosted: Tue Nov 26, 2013 7:55 am 
Offline

Joined: Fri Feb 10, 2012 4:27 pm
Posts: 352
carbon has some of the highest tensile strengths out there and can handle much more than just 70kg.

now, if you accidentally overtightened your stem and crushed your bars, or crashed in a manner as to whack your bars a good one.... well thats a different story....


Top
 Profile  
 
PostPosted: Tue Nov 26, 2013 2:01 pm 
Offline

Joined: Sat Dec 13, 2003 2:25 am
Posts: 4516
Location: Canada
+1. Ride what you like. Maggie rode a carbon bar in Paris-Roubaix and he is your size...


Top
 Profile  
 
PostPosted: Tue Nov 26, 2013 11:13 pm 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7371
Location: San Francisco, CA
The key here is "at some point". For a pro riding Paris-Roubaix a set of $300 carbon bars may well be one-use disposable. It essentially doesn't fatigue but doesn't take abuse well so make up your own mind. $/gram weight savings for carbon bars is unfavorable relative to many other options for weight savings, if you compare to the lightest Al bars.

_________________
http://djconnel.blogspot.com/
Fuji SL/1
\


Top
 Profile  
 
PostPosted: Tue Nov 26, 2013 11:39 pm 
Offline
User avatar

Joined: Thu Sep 21, 2006 8:54 pm
Posts: 668
Location: Reading, UK
Carbon bar weight saving over alloy may not be huge but the shaping can be more sophisticated and they feel warm to touch rather than cold. I like carbon bars.

Anecdotal evidence, but the only broken bars I've seen have been alloy.


Top
 Profile  
 
PostPosted: Wed Nov 27, 2013 12:54 am 
Offline
User avatar

Joined: Wed Sep 26, 2007 1:57 pm
Posts: 7371
Location: San Francisco, CA
Miller wrote:
Carbon bar weight saving over alloy may not be huge but the shaping can be more sophisticated and they feel warm to touch rather than cold. I like carbon bars.

Anecdotal evidence, but the only broken bars I've seen have been alloy.


Once you forget about trying to make them light I agree you can do cool stuff with carbon.

That said, this was my GF's bars, removing her from the lead group on the final lap in her first-ever cross race in 2007:

Image

A potential race podium is a major price to pay for a few grams.

That said, I think carbon bars have improved since then. Those old Eastons had a bad reputation.

_________________
http://djconnel.blogspot.com/
Fuji SL/1
\


Top
 Profile  
 
Posted: Wed Nov 27, 2013 12:54 am 


Top
  
 
Display posts from previous:  Sort by  
Post new topic Reply to topic  [ 27 posts ] 
Go to page 1, 2  Next


Who is online

Users browsing this forum: Exabot [Bot], Google Adsense [Bot] and 38 guests


You cannot post new topics in this forum
You cannot reply to topics in this forum
You cannot edit your posts in this forum
You cannot delete your posts in this forum
You cannot post attachments in this forum

Search for:
Jump to:  

   Similar Topics   Author   Replies   Views   Last post 
There are no new unread posts for this topic. Mountainbike crankset on roadbike?

in Road

Zak

10

1043

Mon Feb 24, 2014 9:20 pm

Chris_W View the latest post

There are no new unread posts for this topic. RACING ZERO CARBON

in Road

virenque

4

890

Wed Jul 30, 2014 9:35 pm

sawyer View the latest post

There are no new unread posts for this topic. Carbon frame painting in US?

[ Go to page: 1, 2 ]

in Road

Ltoddokc

15

1000

Fri Sep 05, 2014 8:08 pm

mjduct View the latest post

There are no new unread posts for this topic. Aspide Carbon FX + Open

in Road

Bogan

4

858

Wed Feb 19, 2014 6:20 am

Bogan View the latest post

There are no new unread posts for this topic. carbon-ti X-ring full Ti EVO 50T

in Road

elfuinha

5

841

Tue Jan 21, 2014 10:32 pm

desperado95219 View the latest post


It is currently Sun Dec 21, 2014 1:45 am

All times are UTC + 1 hour




Advertising   –  FAQ   –  Contact   –  Convert   –  About

© Weight Weenies 2000-2013
hosted by starbike.com


How to get rid of these ads? Just register!


Powered by phpBB