Cycling and bicycle discussion forums. 
   Click here to join our community Log in to access your Control Panel  


Go Back   > >

Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

User Tag List

Reply
 
Thread Tools Search this Thread
Old 01-17-10, 06:36 PM   #1
chico1st
30mi/day commuter
Thread Starter
 
Join Date: Apr 2008
Location: Toronto, Canada
Bikes:
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
exploding nipples

usually when i work on old wheels the nipples sort of shatter when I attempt to turn them. The edges dont round, the whole part where my spoke wrench is sort of crumbles.

This happens to me a lot and its very annoying... because after this happens to a few spokes i basically have to rebuild the wheel. I use penetrating oil as a note.

and in case you were expecting something else you can watch this: look out they swear

Last edited by chico1st; 01-17-10 at 06:40 PM.
chico1st is offline   Reply With Quote
Old 01-17-10, 06:47 PM   #2
bikinfool
I have senior moments...
 
bikinfool's Avatar
 
Join Date: Oct 2008
Location: Woodside, CA
Bikes: Many
Posts: 2,152
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Sounds like corrosion won. Why are they in such poor shape? Why do you work on so many old poor condition wheels is what I'm wondering...
bikinfool is offline   Reply With Quote
Old 01-17-10, 07:25 PM   #3
chico1st
30mi/day commuter
Thread Starter
 
Join Date: Apr 2008
Location: Toronto, Canada
Bikes:
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Why do you work on so many old poor condition wheels is what I'm wondering...
I work at a bike co-op

The city I live in (hamilton) diverts many of the bikes headed for the dump to our co-op.. which is sweet, but everything is super old.
chico1st is offline   Reply With Quote
Old 01-17-10, 07:49 PM   #4
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
must be made from poorer quality metals.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 01-17-10, 08:02 PM   #5
rydaddy
Type 1 Racer
 
rydaddy's Avatar
 
Join Date: Apr 2006
Location: Davis, CA
Bikes: A dozen or so.
Posts: 2,579
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Poorly maintained alloy?
rydaddy is offline   Reply With Quote
Old 01-17-10, 08:09 PM   #6
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by rydaddy View Post
Poorly maintained alloy?
rusty spoke threads?
rust has more material than the original metal form, maybe they expanded enough to cause hairline cracks in the nipples?
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 01-17-10, 08:17 PM   #7
rydaddy
Type 1 Racer
 
rydaddy's Avatar
 
Join Date: Apr 2006
Location: Davis, CA
Bikes: A dozen or so.
Posts: 2,579
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by AEO View Post
rusty spoke threads?
rust has more material than the original metal form, maybe they expanded enough to cause hairline cracks in the nipples?
My only experience was when I tried truing my FSA mountain bike wheels (w/alloy nipples) they sheared after only a quarter turn. Then a few more did the same thing.
rydaddy is offline   Reply With Quote
Old 01-17-10, 08:22 PM   #8
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
but these are probably cheap wheels if they're headed for the dump.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 01-17-10, 08:44 PM   #9
nitropowered
Senior Member
 
Join Date: Dec 2004
Location: Athens, Ohio
Bikes: Custom Custom Custom
Posts: 5,104
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Probably aluminum nipples. Old aluminum nipples (>1year) will typically crumble
nitropowered is offline   Reply With Quote
Old 01-17-10, 08:54 PM   #10
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by nitropowered View Post
Probably aluminum nipples. Old aluminum nipples (>1year) will typically crumble
Where did you get that idea? I haven't had one fail in at least twelve years.
Al1943 is offline   Reply With Quote
Old 01-17-10, 09:32 PM   #11
chico1st
30mi/day commuter
Thread Starter
 
Join Date: Apr 2008
Location: Toronto, Canada
Bikes:
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
but these are probably cheap wheels if they're headed for the dump.
not really usually all the parts are pretty nice... just the nipples fail.... its very frustrating
chico1st is offline   Reply With Quote
Old 01-17-10, 10:11 PM   #12
AEO
Senior Member
 
AEO's Avatar
 
Join Date: Jun 2007
Location: A Coffin Called Earth. or Toronto, ON
Bikes: Bianchi, Miyata, Dahon, Rossin
Posts: 12,258
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
hmmm... must be the acid rain eating away at the metal in the nipple then.
__________________
Food for thought: if you aren't dead by 2050, you and your entire family will be within a few years from starvation. Now that is a cruel gift to leave for your offspring. ;)
http://sanfrancisco.ibtimes.com/arti...ger-photos.htm
AEO is offline   Reply With Quote
Old 01-17-10, 11:21 PM   #13
chico1st
30mi/day commuter
Thread Starter
 
Join Date: Apr 2008
Location: Toronto, Canada
Bikes:
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
you know its funny you say that because hamilton (where i live now) is a steel town and its not known for its air/rain quality...plus all of buffaloes pollution floats up here
chico1st is offline   Reply With Quote
Old 01-18-10, 12:16 PM   #14
Da Tinker
Can't ride enough!
 
Da Tinker's Avatar
 
Join Date: Aug 2002
Location: south Louisiana
Bikes: IFab Crown Jewel, Giant Defy, Hardtail MTB, Fuji finest, Bianchi FG conversion
Posts: 1,235
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
That's a heck of a thread title. Imagine what it must look like to the uninitiated.
Da Tinker is offline   Reply With Quote
Old 01-18-10, 12:23 PM   #15
HillRider 
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Bikes: '''96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '12 Surly Pacer, All are 3x8,9 or 10. It is hilly around here!
Posts: 28,776
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 36 Post(s)
If these old wheels were ridden in wet, salty conditions and/or stored outside, you have real corrosion problems. Aluminum nipples are particularly prone to this kind of damage (and failure) but brass isn't immune either.

And, yes, your thread title did conjure up an interesting mental image.
HillRider is offline   Reply With Quote
Old 01-18-10, 01:36 PM   #16
Al1943
Senior Member
 
Join Date: Feb 2005
Location: Oklahoma
Bikes: Trek 5500, Colnago C-50
Posts: 9,433
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by chico1st View Post
you know its funny you say that because hamilton (where i live now) is a steel town and its not known for its air/rain quality...plus all of buffaloes pollution floats up here
The buffaloes are bad about polluting here in Oklahoma too but it doesn't float.
Al1943 is offline   Reply With Quote
Old 01-18-10, 01:43 PM   #17
FBinNY 
Senior Member
 
Join Date: Apr 2009
Location: New Rochelle, NY
Bikes: too many bikes from 1967 10s (5x2)Frejus to a Sumitomo Ti/Chorus aluminum 10s (10x2), plus one non-susp mtn bike I use as my commuter
Posts: 29,401
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 78 Post(s)
If it had non stainless spokes, rust may have expanded the threads not only binding them but stressing the nipple radially. Your added stress of trying to turn them finished them off. Even with stainless spokes, nipples sometimes get bound to the spoke and trying to turn them crumbles the flats.

3 suggestions which will help on borderline cases.

1- use a 3 or 4 corner spoke wrench when working on tight or old wheels. It isn't necessary with good wheels but helps with ones like what you work on.
2- add a drop of penetrating oil to each nipple where the spoke emerges, then spin the wheel to drive it in. Set the wheel aside a few hours for it to work it's magic.
3- cut down an old broom handle, or broken hockey stick if you're Canadian, to about 18" or half a meter. Wedge it between the rim and hub, so that you can use it to push the rim across a bit and take some tension off the spoke you're turning. Don't overdo it, just lighten the load a bit. This will greatly reduce the torque needed to turn the nipples.
__________________
FB
Chain-L site

An ounce of diagnosis is worth a pound of cure.

“Never argue with an idiot. He will only bring you down to his level and beat you with experience.”, George Carlin

“One accurate measurement is worth a thousand expert opinions” - Adm Grace Murray Hopper - USN

WARNING, I'm from New York. Thin skinned people should maintain safe distance.
FBinNY is offline   Reply With Quote
Old 01-18-10, 02:26 PM   #18
chico1st
30mi/day commuter
Thread Starter
 
Join Date: Apr 2008
Location: Toronto, Canada
Bikes:
Posts: 794
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
3- cut down an old broom handle, or broken hockey stick if you're Canadian, to about 18" or half a meter. Wedge it between the rim and hub, so that you can use it to push the rim across a bit and take some tension off the spoke you're turning. Don't overdo it, just lighten the load a bit. This will greatly reduce the torque needed to turn the nipples.
I wish i had heard that 3 years ago... I have scraped/rebuilt so many wheels due to this problem.
chico1st is offline   Reply With Quote
Reply


Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off



All times are GMT -6. The time now is 07:04 PM.