Time ASX Titan failure (Happened this morning!)

Discuss light weight issues concerning road bikes & parts.
SYST6
Posts: 39
Joined: Wed May 09, 2007 1:23 pm

by SYST6

wholeheartedly. on my asx titan the axle / spider literally twisted in the carbon fiber literally leaving pedals at 2 o'clock/ 6 o'clock. Further, I was only given partial credit on the cranks which I used to purchase second pair of record cranks :D
No problems with the record/ second stiffest cranks i've ever used w/ tighter q factor than time !

by Weenie


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zebragonzo
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Joined: Thu Oct 18, 2007 7:35 am

by zebragonzo

What I would ask is if you'd crashed on these bikes before?

There tends to be some sort of impact that causes delamination for spontaneous failure of this standard being as carbon doesn't exhibit most metal trends for failure modes.

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Paulo Casalta
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by Paulo Casalta

The only crash I had was dued to the failure of the crankset :x
No previous damage or impact on my case.

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zebragonzo
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by zebragonzo

I suppose it's down to the manufacturer then. I've had a lecure this morning about why CF fails!

mises
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by mises

To me it's bad design or bad manufacturing. If low weight was the problem then THM would be having significantly more failures than Stronglight/Time.

It's still largely manual work and all you need is one lazy employee who decides his job would be easier doing the layup his way.

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Coolhand
Posts: 778
Joined: Mon Jul 05, 2004 5:03 pm

by Coolhand

Speedgoat had something in their bikeblog a while back about Time crank failures as well.

FYI
This forum would be a better place if you had to know what you were talking about prior to posting. And if you took yourself less seriously.

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DocRay
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by DocRay

Paulo Casalta wrote:So, for as much as you hate carbon stuff, your words are nothing but unfair and bitter.


My opinion is that carbon fiber is not a material with universal applications in cycling. It has it's place, just not everywhere.
I ride a carbon bike with carbon wheels.

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DocRay
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by DocRay

zebragonzo wrote:There tends to be some sort of impact that causes delamination for spontaneous failure of this standard being as carbon doesn't exhibit most metal trends for failure modes.


That's true, it really doesn't fatigue, but inproper resin penetration and curing will get worse with time and use.
Porosity is problem with metal castings, but the industry has dealt with this very well.

Of course, this could all just be very bad luck.

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Alpinist
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Joined: Sat Dec 24, 2005 4:08 pm
Location: southeast VA

by Alpinist

I lost 3 bolts. Upon removing the small chain ring, I found 3 eyelets cracked.
I will replace the time crank set with another brand. I'm glad I did not have a failure while riding.

2 thumbs down for Time cranks.
Dare to Fail

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beatnik
Posts: 1237
Joined: Thu Aug 03, 2006 6:38 pm

by beatnik

I doesn´t surprise to me. Yours is not the first i see.
Biomechanical spreadsheet. Sizing&Fitting.

http://weightweenies.starbike.com/forum ... 8e319d185b

Sasha011
Posts: 631
Joined: Tue May 01, 2007 5:40 pm

by Sasha011

does anyone have the picture of the duar-ace left crankarm hanging on the shoe of a discovery rider after a fall??? it is from the 2005 season and i think it is manuel beltran...

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beatnik
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by beatnik

Image
Biomechanical spreadsheet. Sizing&Fitting.

http://weightweenies.starbike.com/forum ... 8e319d185b

Irish
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Joined: Mon Jul 26, 2004 8:57 pm
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by Irish

THIS COULD BE THE VERY REASON CAMPAG USE SMALLER CHAINRING BOLTS ON THIER CRANKS = MORE MATERIAL +GREATER STRENGHT

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jipperd
Moderator / Brake Pad Boy
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by jipperd

Sasha011 wrote:does anyone have the picture of the duar-ace left crankarm hanging on the shoe of a discovery rider after a fall??? it is from the 2005 season and i think it is manuel beltran...


It was Benoit Joachim in the 2005 Vuelta:

Image
http://weightweenies.starbike.com/forum ... p?id=23809
Last edited by jipperd on Wed Jan 16, 2008 7:52 pm, edited 2 times in total.

by Weenie


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beatnik
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Joined: Thu Aug 03, 2006 6:38 pm

by beatnik

That crankarm is not broken at all :lol:
Last edited by beatnik on Wed Jan 16, 2008 8:01 pm, edited 1 time in total.
Biomechanical spreadsheet. Sizing&Fitting.

http://weightweenies.starbike.com/forum ... 8e319d185b

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