Stronglight Pulsion...bit of a structural failure!

Discuss light weight issues concerning road bikes & parts.
Post Reply
snips
Posts: 275
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).
Attachments
chainsetpic01.jpg
Last edited by snips on Sat Jun 03, 2006 5:48 pm, edited 1 time in total.

User avatar
col hicks
Posts: 987
Joined: Tue Mar 15, 2005 8:59 pm
Location: u.k

by col hicks

that sucks it makes me not want to ride mine

User avatar
Ramjm_2000
Posts: 549
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.

User avatar
Rich_W
Posts: 1876
Joined: Sat Dec 11, 2004 1:31 pm
Location: On an Island 6 Miles at Sea. Move over Swanson, I'm drivin...

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: 1445
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.

User avatar
strobbekoen
Posts: 4446
Joined: Wed May 18, 2005 6:24 pm
Location: BELGIUM

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

User avatar
ergott
Posts: 2763
Joined: Tue Apr 18, 2006 3:03 am
Location: Islip, NY
Contact:

by ergott

Hope you're ok.

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

-Eric

snips
Posts: 275
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 :)

User avatar
strobbekoen
Posts: 4446
Joined: Wed May 18, 2005 6:24 pm
Location: BELGIUM

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:

User avatar
jeremyb
Posts: 531
Joined: Fri May 21, 2004 7:31 pm
Location: Stumptown USA
Contact:

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

Post Reply
  • Similar Topics
    Replies
    Views
    Last post