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 09-26-06, 10:54 PM   #1
Shorty_McHotdog
Junior Member
Thread Starter
 
Shorty_McHotdog's Avatar
 
Join Date: Sep 2006
Location: So. Cal
Bikes:
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Creaky noise, i'm a noob :(

Hi everyone. I just recently got into more serious biking so I don't really know how to do .. anything. haha. Anyway, my poor bike's been making a sort of creaky/squeaky noise lately. It sounds as if the break pads were rubbing against the tire, so basically like rubber rubbing against something. But the noise comes from either the cassette area or the crankset area, I can't really tell. I have a Trek 3700 mtb (with the store components), i got it second-hand but it was hardly used and in very good condition. I know the problem is probably something in a number of things, but can anyone point me in some direction please? I read some of the threads on here about bottom bracket noises, but I wouldn't know how to fix or clean stuff properly, in that case could anyone refer me to a book or guide i could use to maintain my bike? haha, oh my gosh, sorry for all the questions, i have so much to learn! ahh
I'm from Southern California by the way! Thanks in advance.
Shorty_McHotdog is offline   Reply With Quote
Old 09-27-06, 10:24 AM   #2
moxfyre
cyclist/gearhead/cycli...
 
moxfyre's Avatar
 
Join Date: Oct 2004
Location: DC / Maryland suburbs
Bikes: Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
Posts: 4,166
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
It does sound like the infamous "creaky bottom bracket syndrome" ... but it could be something else too. Is the noise regular or irregular? Does it occur once per pedal cycle, once per wheel revolution, or irregularly? Do any particular gear combinations make it worse or better?

As for a book, I recommend this excellent book: http://www.amazon.com/exec/obidos/AS...s-20/ref=nosim It's $13, aimed at beginners, has excellent illustrations, and yet it's very complete and thorough and can teach you nearly everything you need to know for bike repairs. I've practically memorized my copy (it's got the greasy finger stains on the pages to prove it)

And welcome to the forums! I used to live in Orange County, CA when I was little.
moxfyre is offline   Reply With Quote
Old 09-27-06, 10:43 AM   #3
bcoppola
King of the molehills
 
bcoppola's Avatar
 
Join Date: May 2006
Location: Detroit 'burbs, east side.
Bikes: '04 Giant OCR2, '87 Schwinn World Sport F/G conversion, '85 Schwinn Super Le Tour, '92 Trek 820
Posts: 1,195
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Those "creaky squeaky" noises (hmm...a Billy Ray Cyrus biking song title?) can be tricky to find, because the sound travels thru the tubes and can sound like it's coming from anywhere. See the Park Tools repair site referenced in Moxfyre's sig line. They list several possible causes - some of which can be unexpected but easy to fix. Also see and bookmark the Sheldon Brown site. It is a superb resource and has answered a lot of my newbie questions.

For example: When I first got my used Giant OCR2 I had a rhythmic creak in time with my pedaling. Oh crap, I thought, a bum bottom bracket. But it turned out to be my seat! A little lube on the rails, especially where they attached to the seat itself and that was it. That and adjusting the seat so I wouldn't rock when pedaling.

Another possible easy fix: try greasing then tightening your chainring bolts (obviously, take them out to grease them).
bcoppola is offline   Reply With Quote
Old 09-27-06, 05:57 PM   #4
DMF 
Elitist Troglodyte
 
DMF's Avatar
 
Join Date: Jun 2006
Location: Dallas
Bikes: 03 Raleigh Professional (steel)
Posts: 6,924
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Get someone to ride alongside you. They'll be much better able to hear where the noise is coming from.
__________________
Stupidity got us into this mess - why can't it get us out?

- Will Rogers
DMF is offline   Reply With Quote
Old 09-28-06, 02:31 AM   #5
Shorty_McHotdog
Junior Member
Thread Starter
 
Shorty_McHotdog's Avatar
 
Join Date: Sep 2006
Location: So. Cal
Bikes:
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by moxfyre
It does sound like the infamous "creaky bottom bracket syndrome" ... but it could be something else too. Is the noise regular or irregular? Does it occur once per pedal cycle, once per wheel revolution, or irregularly? Do any particular gear combinations make it worse or better?

As for a book, I recommend this excellent book: http://www.amazon.com/exec/obidos/AS...s-20/ref=nosim It's $13, aimed at beginners, has excellent illustrations, and yet it's very complete and thorough and can teach you nearly everything you need to know for bike repairs. I've practically memorized my copy (it's got the greasy finger stains on the pages to prove it)

And welcome to the forums! I used to live in Orange County, CA when I was little.
Yea, the OC! lol
Anyway, the noise is pretty regular when i pedal- once per pedal cycle. When I'm coasting the noise goes away. With some gear combinations i get a worse-r noise, but i think that's because the chain actually starts rubbing with other parts. A bad gear combo i guess.
Thanks, this forum is a pretty neat place btw, funny icon. my younger brother and i used to read Calvin and Hobbes a lot. haha

Last edited by Shorty_McHotdog; 09-28-06 at 02:55 AM.
Shorty_McHotdog is offline   Reply With Quote
Old 09-28-06, 02:40 AM   #6
Shorty_McHotdog
Junior Member
Thread Starter
 
Shorty_McHotdog's Avatar
 
Join Date: Sep 2006
Location: So. Cal
Bikes:
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by bcoppola
Those "creaky squeaky" noises (hmm...a Billy Ray Cyrus biking song title?) can be tricky to find, because the sound travels thru the tubes and can sound like it's coming from anywhere. See the Park Tools repair site referenced in Moxfyre's sig line. They list several possible causes - some of which can be unexpected but easy to fix. Also see and bookmark the Sheldon Brown site. It is a superb resource and has answered a lot of my newbie questions.

For example: When I first got my used Giant OCR2 I had a rhythmic creak in time with my pedaling. Oh crap, I thought, a bum bottom bracket. But it turned out to be my seat! A little lube on the rails, especially where they attached to the seat itself and that was it. That and adjusting the seat so I wouldn't rock when pedaling.

Another possible easy fix: try greasing then tightening your chainring bolts (obviously, take them out to grease them).
Creaky-squeaky, I'm telling ya, it'll be the next doggone hit. haha, i hate rhyming, but it was necessary.
I've seen parts of the Sheldon Brown site, it's pretty extensive! Yea, i hope mine isn't a big problem either. Maybe I should have a lot of the bike cleaned and greased and re-tightened because I'm not sure when it got tuned up last. :\ I'll try the chainring bolts for now though. Thanks

edit: ahh, the Park Tool site shows you chainring bolts! excellent!

Last edited by Shorty_McHotdog; 09-28-06 at 02:57 AM.
Shorty_McHotdog is offline   Reply With Quote
Old 09-28-06, 02:43 AM   #7
Shorty_McHotdog
Junior Member
Thread Starter
 
Shorty_McHotdog's Avatar
 
Join Date: Sep 2006
Location: So. Cal
Bikes:
Posts: 18
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by DMF
Get someone to ride alongside you. They'll be much better able to hear where the noise is coming from.
That's actually a pretty good idea, i won't have to guess as much.
Shorty_McHotdog is offline   Reply With Quote
Old 09-28-06, 09:03 AM   #8
moxfyre
cyclist/gearhead/cycli...
 
moxfyre's Avatar
 
Join Date: Oct 2004
Location: DC / Maryland suburbs
Bikes: Homebuilt tourer/commuter, modified-beyond-recognition 1990 Trek 1100, reasonably stock 2002-ish Gary Fisher Hoo Koo E Koo
Posts: 4,166
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Quote:
Originally Posted by Shorty_McHotdog
Anyway, the noise is pretty regular when i pedal- once per pedal cycle. When I'm coasting the noise goes away. With some gear combinations i get a worse-r noise, but i think that's because the chain actually starts rubbing with other parts. A bad gear combo i guess.
Another surprisingly common source of once-per-pedal-cycle noise: THE SADDLE! If your saddle or seatpost aren't tightened up properly, they may creak regularly as you shift your weight from side to side, that is once per pedal cycle. Check into that.
moxfyre 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 08:24 PM.