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PostPosted: Sat Jun 03, 2006 5:21 pm 
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Joined: Thu Dec 09, 2004 1:14 pm
Posts: 274
Location: London - UK
On the way to race this afternoon, put the power down away from some traffic lights and BOOM...bits of chainset all over the road.
Everything torqued up properly and no damage. One tab breaking would be bad but for three to go...I'm speechless (and also lost a Tune chainring bolt whilst trying to get chainring on in a state where I could hobble home...rats).


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Last edited by snips on Sat Jun 03, 2006 5:48 pm, edited 1 time in total.
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PostPosted: Sat Jun 03, 2006 5:32 pm 
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Joined: Tue Mar 15, 2005 8:59 pm
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Location: u.k
that sucks it makes me not want to ride mine


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PostPosted: Sat Jun 03, 2006 7:06 pm 
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Joined: Thu Feb 02, 2006 10:26 pm
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Location: NoVA
Wow! :shock: Makes me glad I went with the Vulcans. Let us know how/if stronglight takes care of the problem.


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PostPosted: Sat Jun 03, 2006 7:08 pm 
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Location: Funky Town, NJ
lovely... those new record cranks can't come out fast enough...

were you getting any funky creaking before they failed?


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PostPosted: Sat Jun 03, 2006 7:09 pm 
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Joined: Thu Nov 04, 2004 10:56 pm
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Location: Wichita, KS
Haven't we seen this same sort of failure before?

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PostPosted: Sat Jun 03, 2006 7:25 pm 
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Joined: Mon Dec 19, 2005 9:16 am
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Is it possible the Tune chainring bolts allow some play? Or are they the exact same size at the pulsion bolts?
Sorry you had a problem but glad you were not hurt.


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PostPosted: Sat Jun 03, 2006 7:36 pm 
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Joined: Wed May 18, 2005 6:24 pm
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Location: BELGIUM
drjones96 wrote:
Haven't we seen this same sort of failure before?


Indeed, i am sure i saw it before too, not sure where though


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PostPosted: Sat Jun 03, 2006 7:37 pm 
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Location: Islip, NY
Hope you're ok.

Check the right chainstay to. It looks like there is a gouge in it.

-Eric


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PostPosted: Sun Jun 04, 2006 2:58 pm 
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Joined: Thu Dec 09, 2004 1:14 pm
Posts: 274
Location: London - UK
Tune bolts were an exact fit and, as said, torqued properly.
Had no indication that it was going to break either, ie creaking or movement, it just literally exploded! I was fine...was a bit of a hassle limping back home though.
I imagine one tab failed then the others failed as the chainring twisted and moved. Its going in the post to France tomorrow...

Oh and the marks on the chainstay is in thick protective plastic which I've stuck there... it's the old mountainbiker in me that causes old habits to die hard :)


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PostPosted: Sun Jun 04, 2006 3:20 pm 
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Location: BELGIUM
check out this old topic
http://weightweenies.starbike.com/forum/viewtopic.php?t=10033&highlight=pulsion+broken

apparently, the guy broke it while pushing down the power at a traffic light........... :shock:


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PostPosted: Tue Jun 06, 2006 11:44 pm 
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Joined: Fri May 21, 2004 7:31 pm
Posts: 531
Location: Stumptown USA
my pulsions are thin around that area as well. Should I send them to Stronglight? I didnt buy them new.

Maybe I should beef up the area with a little extra carbon and some epoxy?

j

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