Stronglight Pulsion...bit of a structural failure!

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snips
Posts: 255
Joined: Thu Dec 09, 2004 1:14 pm
Location: London - UK

by snips

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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col hicks
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Location: u.k

by col hicks

that sucks it makes me not want to ride mine

by Weenie


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Ramjm_2000
Posts: 524
Joined: Thu Feb 02, 2006 10:26 pm
Location: US of A

by Ramjm_2000

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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Rich_W
Posts: 1957
Joined: Sat Dec 11, 2004 1:31 pm
Location: LBI / Sarasota

by Rich_W

lovely... those new record cranks can't come out fast enough...

were you getting any funky creaking before they failed?


flying
Posts: 2861
Joined: Mon Dec 19, 2005 9:16 am

by flying

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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strobbekoen
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by strobbekoen

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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ergott
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by ergott

Hope you're ok.

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

-Eric

snips
Posts: 255
Joined: Thu Dec 09, 2004 1:14 pm
Location: London - UK

by snips

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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strobbekoen
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by strobbekoen

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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jeremyb
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Location: Stumptown USA
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by jeremyb

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

by Weenie


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