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 03-10-08, 05:15 PM   #1
powpow
Senior Member
Thread Starter
 
powpow's Avatar
 
Join Date: Jan 2005
Location: Berkeley, CA
Bikes:
Posts: 1,075
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Help identify my creak!

I've got the dreaded elusive creak going on in my crankset. It happens only when climbing and standing on the pedals. It's getting to be pretty bad and I'm surprised something hasn't broken yet. Here's is what I've checked:

Pedals: removed and regreased the threads and the pedals themselves
Cleats: rode with my sandals, the creak didn't go away
Crankarms: tightened
Crank bolts: tightened
Bottom bracket: the mechanic at the Performance store took off my crank and tightened the bottom bracket, saying it was a bit loose. This did not help. He also said it didn't need more grease.
I also switched out the seatpost and that wasn't it either.

Thoughts?
powpow is offline   Reply With Quote
Old 03-10-08, 05:28 PM   #2
neil0502
My bike's better than me!
 
neil0502's Avatar
 
Join Date: Feb 2005
Location: Northern Colorado
Bikes: (2) Moots Vamoots, (1) Cannondale T2000 tourer, (1) Diamondback Response Comp mtb
Posts: 2,041
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
You many find the following links helpful in tracking it down:

http://sheldonbrown.com/creaks.html

AND

http://www.parktool.com/repair/readhowto.asp?id=123

It's usually just a matter of patiently removing, cleaning,
re-lubricating, and re-torquing fasteners until it quiets down.
neil0502 is offline   Reply With Quote
Old 03-10-08, 05:36 PM   #3
Crash716
i got nothing.
 
Crash716's Avatar
 
Join Date: May 2007
Location: Cali Forn NI A (SoCal)
Bikes: 13 BH G6 with SRAM Red
Posts: 5,620
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
my creak turned out to be a cracked BB on a Carbon bike....did you check it with a Flashlight for cracks?
__________________
14 days...
Crash716 is offline   Reply With Quote
Old 03-10-08, 06:17 PM   #4
sideshow_bob
Senior Member
 
Join Date: Jan 2008
Bikes:
Posts: 295
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
if you've simply tightened the bb, in order i'd:

a) remove bb, clean bb threads and shell. reinstall using grease and teflon tape
b) if it still creaks .. remove the chainring bolts, grease, teflon tape and reinstall to spec
c) if it still creaks .. replace bb entirely

past that if it's still creaking, it's probably unlikely to be the bb, unless it's cracked.

i was once convinced i had a creaking bb. every time i stood on the pedals for about a month. it was driving me nuts. turned out to be a hairline crack in the rear rim. so as has also been posted, the noise isn't guaranteed to be coming out of the bb.

--brett
sideshow_bob is offline   Reply With Quote
Old 03-10-08, 07:31 PM   #5
ultraman6970
Senior Member
 
Join Date: Dec 2005
Bikes:
Posts: 7,860
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Change the Skewers... sometimes the QUick releases get old, specially the plastic ones. Sometimes put grease and oil to them fix the problem.

UM
ultraman6970 is offline   Reply With Quote
Old 03-10-08, 07:51 PM   #6
mparker326 
Senior Member
 
mparker326's Avatar
 
Join Date: Aug 2006
Location: Knoxville, TN
Bikes: Schwinn Paramount P15, Fisher Montare, Proteus, Rivendell Quickbeam
Posts: 1,972
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
I had the same thing. Finally tracked it down to the chainring bolts.
mparker326 is offline   Reply With Quote
Old 03-10-08, 09:56 PM   #7
jacksbike
Senior Member
 
Join Date: Jul 2005
Location: New Haven, CT area
Bikes: Trek 7.5 Hybrid, Trek 1.1 Road, Holdsworth touring,Raleigh International,Ritchey Commando,Italvega Speciallissimo,et.al.
Posts: 1,341
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Try a different set of pedals first. I used to spend gobs of time dissasembling bb's until I discovered that a lot of the time it is the pedals themselves. If not that, I would check the frame itself for hairline cracks in and around the bb shell. Check that the chainring bolts are tight. Left and right cranks can flex, depending on the quality of the unit itself.
jacksbike is offline   Reply With Quote
Old 03-11-08, 07:32 AM   #8
Roadplay
Member
 
Roadplay's Avatar
 
Join Date: Dec 2006
Location: Mid West
Bikes: SWork Tarmac; Merlin CR3/2.5 Works; Scott S1 Speedster
Posts: 39
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
What kind of wheels do you have? I had a set of Mavic ESs that creaked under load (front wheel). Tightened them up and solved the problem.
Roadplay is offline   Reply With Quote
Old 03-11-08, 09:57 AM   #9
tellyho
Your mom
 
Join Date: Aug 2006
Bikes:
Posts: 2,541
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Lots of Teflon tape solved my creak - pull the BB, tape the hell out of it, grease the interface between the NDS cup and the cartridge, reinstall.
tellyho 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 12:43 AM.