Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

Creeking sound from BB (or cranks?)

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.

Creeking sound from BB (or cranks?)

Old 10-18-13, 10:30 AM
  #1  
Bike Gremlin
Bike Gremlin
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,092

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Liked 2 Times in 2 Posts
Creeking sound from BB (or cranks?)

When pedalling hard there is a sound from BB (at least it seems so). Like wood kreeking. Only when pedaling hard hard, when just spinning backwards there is no noise. When leaning hard on one peddal, or when pedalling hard there is the noise.

It is a Shimano triple crankset (tourney I think) and square tapper BB.

Any ideas what it is? Should it be fixed/replaced, or is it good to go as long as I don't mind the noise?


If it helps: pedals are greased, and when I'm off the saddle it is also heard, so it's not the saddle or the post.
Bike Gremlin is offline  
Old 10-18-13, 10:32 AM
  #2  
rustjunkie
Senior Member
 
rustjunkie's Avatar
 
Join Date: Jul 2013
Location: Los Angeles, CA 91016
Posts: 56
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Make sure the pedals, crank arms, chainring bolts, and all bottom bracket parts are tight.
Not good to ignore it.
rustjunkie is offline  
Old 10-18-13, 10:54 AM
  #3  
CoachManny
Senior Member
 
CoachManny's Avatar
 
Join Date: Sep 2013
Location: Florissant, MO
Posts: 105

Bikes: 2014 Specialized Secteur Sport and 2016 Specialized Pitch 650b

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I just replaced my BB because it was making a bunch of noise especially when going uphill.

Manny
CoachManny is offline  
Old 10-18-13, 11:03 AM
  #4  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,508

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 474 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Lots of ideas about the source of a creak - you need to eliminate them one by one. If you jump to replacing the BB right away the creak may go away, but not necessarily due to the BB replacement.
http://www.sheldonbrown.com/creaks.html
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline  
Old 10-19-13, 07:05 AM
  #5  
Bike Gremlin
Bike Gremlin
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,092

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Liked 2 Times in 2 Posts
It was the BB. Went to the LBS to get a replacement, but they said it is good to go - won't die suddenly, might serve me 4-5 thousand kms more if I don't mind the noise. So I let it be.
Bike Gremlin is offline  
Old 10-19-13, 10:00 AM
  #6  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,508

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 474 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I'd like to trust the shop's evaluation, but I don't. If you truly have a square taper BB there is nothing that would cause noise that would not need attention.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline  
Old 10-19-13, 10:02 AM
  #7  
rustjunkie
Senior Member
 
rustjunkie's Avatar
 
Join Date: Jul 2013
Location: Los Angeles, CA 91016
Posts: 56
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by cny-bikeman View Post
I'd like to trust the shops evaluation, but I don't. If you truly have a square taper BB there is nothing that would cause noise that would not need attention.
+1
rustjunkie is offline  
Old 10-19-13, 10:43 AM
  #8  
Retro Grouch 
Senior Member
 
Retro Grouch's Avatar
 
Join Date: Feb 2004
Location: St Peters, Missouri
Posts: 29,254

Bikes: Catrike 559 I own some others but they don't get ridden very much.

Mentioned: 11 Post(s)
Tagged: 0 Thread(s)
Quoted: 1142 Post(s)
Liked 20 Times in 16 Posts
The torque spec for the bottom bracket in the bottom bracket shell is around 30 ft/lbs. That's quite a bit. It's more than I would use if simply left to my own judgement. A lot of times a BB creak can be silenced by removing the BB, greasing the threads, and torquing it back in place.

If you don't have a torque wrench, imagine a 30 lb weight hanging off the end of a foot long wrench. Tighten it that much.
__________________
My greatest fear is all of my kids standing around my coffin and talking about "how sensible" dad was.
Retro Grouch is offline  
Old 10-19-13, 11:31 AM
  #9  
Bike Gremlin
Bike Gremlin
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,092

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Liked 2 Times in 2 Posts
Originally Posted by Retro Grouch View Post
The torque spec for the bottom bracket in the bottom bracket shell is around 30 ft/lbs. That's quite a bit. It's more than I would use if simply left to my own judgement. A lot of times a BB creak can be silenced by removing the BB, greasing the threads, and torquing it back in place.

If you don't have a torque wrench, imagine a 30 lb weight hanging off the end of a foot long wrench. Tighten it that much.
That's what the LBS guy did. Tightened it real good. But he said he doesn't service it - just that I ride until it really bothers me. Said it won't just fail suddenly, leaving me on the road, but become noiser and noisier. Hell, I just might get the bb tool and replace it myself when the time comes. I have a torque wrench for car and motorcycle repairs, so it will be done right.
Bike Gremlin is offline  
Old 10-19-13, 12:02 PM
  #10  
Blue Belly
Senior Member
 
Blue Belly's Avatar
 
Join Date: Aug 2013
Location: Vermont
Posts: 1,200

Bikes: Pinarello Montello, Merckx MX Leader, Merckx Corsa Extra, Pinarello Prologo, Tredici Magia Nera, Tredici Cross

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 0 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Did he check the headset/stem? Quite often creaks can come from the headset/stem area & resonate through the frame. On a quil stem you can drop a little gear oil around the top of the headset nut & let it seep in. It doesn't take long to pull a stem & check the headset, either. Handlebars are another culprit. It usually pretty obvious when they are creaking, though. Check the torque on everything.
Blue Belly is offline  
Old 10-19-13, 10:37 PM
  #11  
Bike Gremlin
Bike Gremlin
Thread Starter
 
Bike Gremlin's Avatar
 
Join Date: Nov 2010
Location: Novi Sad
Posts: 4,092

Bikes: Custom made on Scott Speedster frame, Custom made on a 1996. steel MTB frame (all but frame changed at least once in the past 20 years).

Mentioned: 18 Post(s)
Tagged: 0 Thread(s)
Quoted: 939 Post(s)
Liked 2 Times in 2 Posts
What exactly do I need to measure to determine the BB size?

I have an alu mtb (29er) frame. With Shimano triple crankset (the one "beneath" Tiagra I think). Frame is some 4-5 years old, I guess it is BSA thread. Just not sure what I need to measure to determine whether it is 68 or 73.


I guess I'd have to remove cranks to measure the spindle length (110, 113, or wider)?
Bike Gremlin is offline  
Old 10-20-13, 06:01 AM
  #12  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,508

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 474 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
I realized my post above does not apply to a cartridge BB, and considering the age of the bike that is what you have. IF the BB is torqued to spec then what the mechanic said may be true.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline  
Old 10-20-13, 06:17 AM
  #13  
oddjob2
Still learning
 
oddjob2's Avatar
 
Join Date: May 2012
Location: North of Canada, Adirondacks, NNJ
Posts: 11,571

Bikes: Too many

Mentioned: 87 Post(s)
Tagged: 2 Thread(s)
Quoted: 820 Post(s)
Likes: 0
Liked 4 Times in 4 Posts
The size is printed right on the bb cartridge. Unfortunately you have to remove it to see the spec. If you DIY, you need a 14mm socket, a crank puller, and a Park BBT-22 to fit inside the cups.
oddjob2 is offline  
Old 10-20-13, 06:32 AM
  #14  
cny-bikeman 
Mechanic/Tourist
 
Join Date: Apr 2007
Location: Syracuse, NY
Posts: 7,508

Bikes: 2008 Novara Randonee - love it. Previous bikes:Motobecane Mirage, 1972 Moto Grand Jubilee (my fave), Jackson Rake 16, 1983 C'dale ST500.

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 474 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Originally Posted by Slaninar View Post
What exactly do I need to measure to determine the BB size?... I guess it is BSA thread. Just not sure what I need to measure to determine whether it is 68 or 73.I guess I'd have to remove cranks to measure the spindle length (110, 113, or wider)?
Yes, it's BSA thread, and BB width is easy - you just measure the width/length (not diameter) of the painted portion As for spindle length, it depends on how creative you are. Yes, once cranks are removed it's fairly simple to measure. With the cranks on it's still possible to determine the spindle length but would take some creativity to figure out how to do so.
__________________
There's no such thing as a routine repair.

Don't tell me what "should" be - either it is, it isn't, or do something about it.

If you think I'm being blunt take it as a compliment - if I thought you were too weak to handle the truth or a strong opinion I would not bother.

Please respect others by taking the time to post clearly so we can answer quickly. All lowercase and multiple typos makes for a hard read. Thanks!
cny-bikeman is offline  
Old 10-20-13, 07:23 AM
  #15  
rumrunn6
Senior Member
 
rumrunn6's Avatar
 
Join Date: Jul 2008
Location: 25 miles northwest of Boston
Posts: 22,676

Bikes: Bottecchia Sprint, GT Timberline 29r

Mentioned: 85 Post(s)
Tagged: 0 Thread(s)
Quoted: 2960 Post(s)
Liked 50 Times in 44 Posts
had a noisy BB once. LBS tightened it. took it for a long ride and it disintegrated. cheap enough to replace. go to another shop
rumrunn6 is offline  
Old 10-21-13, 02:33 AM
  #16  
speedy25
Senior Member
 
Join Date: Mar 2012
Location: NE oHIo
Posts: 921

Bikes: Specialized, Trek, Diamondback, Schwinn, Peugeot

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 109 Post(s)
Liked 3 Times in 3 Posts
My creaks were all from crank arms. Remove, clean, add some never seize to the square and the bolt and no more creaks. When I replaced my first BB, I didnt think to clean the arms at all, I just put them back on. Now I know better.

-SP
speedy25 is offline  

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


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service

Copyright 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.