Go Back  Bike Forums > Bike Forums > Road Cycling
Reload this Page >

Durability of carbon frames

Search
Notices
Road Cycling “It is by riding a bicycle that you learn the contours of a country best, since you have to sweat up the hills and coast down them. Thus you remember them as they actually are, while in a motor car only a high hill impresses you, and you have no such accurate remembrance of country you have driven through as you gain by riding a bicycle.” -- Ernest Hemingway

Durability of carbon frames

Thread Tools
 
Search this Thread
 
Old 02-24-11 | 02:08 PM
  #1  
Thread Starter
Member
 
Joined: Feb 2011
Posts: 26
Likes: 0
Durability of carbon frames

I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
avidcyclist83 is offline  
Reply
Old 02-24-11 | 02:09 PM
  #2  
NathanC's Avatar
Shut up legs
 
Joined: Sep 2007
Posts: 1,625
Likes: 2
From: Sydney

Bikes: Merckx

Facepalm.
NathanC is offline  
Reply
Old 02-24-11 | 02:10 PM
  #3  
Homebrew01's Avatar
Super Moderator
20 Anniversary
 
Joined: Jul 2004
Posts: 21,979
Likes: 1,154
From: Ffld Cnty Connecticut

Bikes: Old Steelies I made, Old Cannondales

Originally Posted by avidcyclist83
How big of a crash is needed to total a carbon frame?

__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.

FYI: https://www.bikeforums.net/forum-sugg...ad-please.html

Last edited by Homebrew01; 02-24-11 at 02:18 PM.
Homebrew01 is offline  
Reply
Old 02-24-11 | 02:12 PM
  #4  
sbxx1985's Avatar
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Oct 2009
Posts: 12,942
Likes: 282
From: Colorado
Originally Posted by Homebrew01
This big:

|-----------------------|
I think it's bigger. Closer to this:

I----------------------------------------------I
sbxx1985 is offline  
Reply
Old 02-24-11 | 02:15 PM
  #5  
RacerOne's Avatar
Hills hurt.. Couches kill
 
Joined: Jun 2008
Posts: 3,370
Likes: 3
From: Brazil, IN

Bikes: 1991 Specialized Sirrus Triple, 2010 Trek Madone 6.5 Project One, 2012 Cannondale Caad10, 2013 Trek Crockett

Nope, only /-/ big.
RacerOne is offline  
Reply
Old 02-24-11 | 02:24 PM
  #6  
Homebrew01's Avatar
Super Moderator
20 Anniversary
 
Joined: Jul 2004
Posts: 21,979
Likes: 1,154
From: Ffld Cnty Connecticut

Bikes: Old Steelies I made, Old Cannondales

Originally Posted by RacerOne
Nope, only /-/ big.
Liks so: ?

__________________
Bikes: Old steel race bikes, old Cannondale race bikes, less old Cannondale race bike, crappy old mtn bike.

FYI: https://www.bikeforums.net/forum-sugg...ad-please.html
Homebrew01 is offline  
Reply
Old 02-24-11 | 02:25 PM
  #7  
mmmdonuts's Avatar
Gluteus Enormus
 
Joined: Dec 2007
Posts: 2,245
Likes: 0
From: Raleigh, NC

Bikes: Yes

A local club is the crashingest group of people I've ever seen. Many injuries but no busted CF that I know of.
mmmdonuts is offline  
Reply
Old 02-24-11 | 02:26 PM
  #8  
sbxx1985's Avatar
Senior Member
Titanium Club Membership
15 Anniversary
 
Joined: Oct 2009
Posts: 12,942
Likes: 282
From: Colorado
At least all the good carbon bikes are made in the US.

Be careful of the ones made in Asia. They will last, on average, five to six rides.
sbxx1985 is offline  
Reply
Old 02-24-11 | 02:43 PM
  #9  
back4more's Avatar
Senior Member
 
Joined: Nov 2010
Posts: 490
Likes: 0
From: NE, Ohio

Bikes: 2010 Cannondale Supersix 3

I hear spontaneous combustion of a CF bike is a bigger concern. I would strap a fire extinguisher on that bike to be safe.
back4more is offline  
Reply
Old 02-24-11 | 02:46 PM
  #10  
pallen's Avatar
Descends like a rock
 
Joined: Oct 2010
Posts: 4,034
Likes: 16
From: Fort Worth, TX

Bikes: Scott Foil, Surly Pacer

Its basically just like paper mache, but lighter and way more expensive.
pallen is offline  
Reply
Old 02-24-11 | 02:47 PM
  #11  
merlinextraligh's Avatar
pan y agua
20 Anniversary
 
Joined: Aug 2005
Posts: 31,810
Likes: 1,232
From: Jacksonville

Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

To give you a serious answer all lightweight bikes can break if you crash them, CF included. That said CF is a lot stronger than many people think, and the odds of breaking your frame in a crash are reasonably low.

I've had 2 crashes in races with my CF bike, and the bike is still fine. I've seen many other people crash Cf bikes without breaking them. And I've seen a few crashes that totaled CF frames, steel frames, and Al frames.

Also, realize that if you do crack a CF frame it's usually repairable.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline  
Reply
Old 02-24-11 | 02:56 PM
  #12  
tuxbailey's Avatar
Senior Member
 
Joined: Jun 2009
Posts: 1,300
Likes: 6
From: Elkridge, MD

Bikes: 2012 Guru Praemio R - 2001 Jamis Ventura - 1990 Specialized Hard Rock (with original tires) - 2012 Trek Cobias

Mind you, these guys ride CF frame all the time


Attached Images
File Type: jpg
THATmuch!.jpg (82.7 KB, 28 views)

Last edited by tuxbailey; 02-24-11 at 03:00 PM.
tuxbailey is offline  
Reply
Old 02-24-11 | 04:04 PM
  #13  
Velo Vol's Avatar
VFL For Life
Titanium Club Membership
20 Anniversary
Community Builder
Active Streak: 30 Days
 
Joined: Feb 2005
Posts: 53,910
Likes: 2,399
From: Knoxville, TN

Bikes: Velo Volmobile

Originally Posted by avidcyclist83
How big of a crash is needed to total a carbon frame?
How do you quantify crashes? Is there a unit of measurement for impact?
__________________
Originally Posted by Velo Vol
People here don't get it.
Velo Vol is online now  
Reply
Old 02-24-11 | 04:14 PM
  #14  
topflightpro's Avatar
Senior Member
15 Anniversary
 
Joined: Jul 2007
Posts: 7,622
Likes: 734
Having broken carbon and aluminum, I'd say the average carbon frame is more likely to survive a major crash than an aluminum frame.

The aluminum frame sustained a dent in the toptube - handlebar slammed into it during the crash. The dent soon led to a crack, making the frame worthless.

And the carbon cracked at the water bottle bosses, which I would assume are a weak spot. To put that in context though, the carbon water bottle cages, which ripped out the bosses, were just fine.
topflightpro is offline  
Reply
Old 02-24-11 | 04:17 PM
  #15  
twobadfish's Avatar
Riding
 
Joined: Dec 2010
Posts: 1,909
Likes: 0
From: Bend, Oregon

Bikes: Motobecane Fantom Cross Pro; Motobecane Nemesis Pro

Originally Posted by Velo Vol
How do you quantify crashes? Is there a unit of measurement for impact?
(M / t)*{(1 + c)*[(2/M)*(Work)]1/2 - (r/d)*(cs1 + s2)**
twobadfish is offline  
Reply
Old 02-24-11 | 04:18 PM
  #16  
Senior Member
 
Joined: Jul 2008
Posts: 514
Likes: 0
From: Kissimmee, FL
search function is your friend...
gazelle5333 is offline  
Reply
Old 02-24-11 | 04:23 PM
  #17  
caloso's Avatar
Senior Member
20 Anniversary
 
Joined: Jul 2002
Posts: 40,863
Likes: 3,115
From: Sacramento, California, USA

Bikes: Specialized Tarmac, Canyon Exceed, Specialized Transition, Ellsworth Roots, Ridley Excalibur

Depends. I've owned two CF bike. One was destroyed when I snapped the headtube off by crashing into a curb. The other is still ticking even though I've probably dumped it on the pavement a dozen times.
caloso is offline  
Reply
Old 02-24-11 | 04:25 PM
  #18  
Senior Member
 
Joined: Sep 2009
Posts: 219
Likes: 0
Originally Posted by Velo Vol
How do you quantify crashes? Is there a unit of measurement for impact?
international media coverage on your crash = big crash

walks bike home crying= not so big crash
iam7head is offline  
Reply
Old 02-24-11 | 04:26 PM
  #19  
Shimagnolo's Avatar
Senior Member
 
Joined: May 2008
Posts: 9,102
Likes: 6,009
From: Zang's Spur, CO
Originally Posted by avidcyclist83
I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
Yes.
Shimagnolo is offline  
Reply
Old 02-24-11 | 04:49 PM
  #20  
Senior Member
 
Joined: Mar 2009
Posts: 2,606
Likes: 0
From: San Diego, CA
Originally Posted by avidcyclist83
I am looking at buying my first carbon frame, but have heard horror stories of them breaking. How big of a crash is needed to total a carbon frame?
Big. Unless you're big then small. Or you could just tell your frame it has some loose threads hanging out and it'll snap from embarrassment. You're basically riding a placemat covered in goo. Everything breaks eventually. With the steerer tube acting like a lever it's no wonder the head tube is usually the thing to go. Tip: Don't hit anyone straight on. Bunny-hop them and take the win. GL
kleinboogie is offline  
Reply
Old 02-24-11 | 05:19 PM
  #21  
Lanterne Rogue's Avatar
Senior Member
 
Joined: Apr 2010
Posts: 210
Likes: 0
I was on a ride last summer in Colorado when, for no apparent reason, another cyclist's carbon fork broke during the descent of Grand Mesa. Among other woes, he lost his ear.

Many people have great experiences with carbon. I have a hard time getting over that one.

Some more carbon pix:

https://www.bustedcarbon.com/
Lanterne Rogue is offline  
Reply
Old 02-24-11 | 05:25 PM
  #22  
Shimagnolo's Avatar
Senior Member
 
Joined: May 2008
Posts: 9,102
Likes: 6,009
From: Zang's Spur, CO
Originally Posted by Lanterne Rogue
Among other woes, he lost his ear.
Ugh!
Was he wearing a helmet?
Shimagnolo is offline  
Reply
Old 02-24-11 | 05:40 PM
  #23  
Lanterne Rogue's Avatar
Senior Member
 
Joined: Apr 2010
Posts: 210
Likes: 0
He was wearing a helmet. People who saw it estimated he was going at least 40 mph when the fork cracked. I heard about it afterward.
Lanterne Rogue is offline  
Reply
Old 02-24-11 | 05:42 PM
  #24  
merlinextraligh's Avatar
pan y agua
20 Anniversary
 
Joined: Aug 2005
Posts: 31,810
Likes: 1,232
From: Jacksonville

Bikes: Willier Zero 7; Merlin Extralight; Calfee Dragonfly tandem, Calfee Adventure tandem; Cervelo P2; Motebecane Ti Fly 29er; Motebecanne Phantom Cross; Schwinn Paramount Track bike

Originally Posted by Lanterne Rogue
I was on a ride last summer in Colorado when, for no apparent reason, another cyclist's carbon fork broke during the descent of Grand Mesa. Among other woes, he lost his ear.

Many people have great experiences with carbon. I have a hard time getting over that one.

Some more carbon pix:

https://www.bustedcarbon.com/
You realize both steel and aluminum forks have been known to break.
__________________
You could fall off a cliff and die.
You could get lost and die.
You could hit a tree and die.
OR YOU COULD STAY HOME AND FALL OFF THE COUCH AND DIE.
merlinextraligh is offline  
Reply
Old 02-24-11 | 05:54 PM
  #25  
Lanterne Rogue's Avatar
Senior Member
 
Joined: Apr 2010
Posts: 210
Likes: 0
Yep. Everything breaks. Not always this dramatically, though:


Lanterne Rogue is offline  
Reply


Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service -

Copyright © 2026 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.