Notices
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.

Weird Noise

Old 09-21-23, 08:38 AM
  #1  
Newbie
Thread Starter
 
brokewheelspoke's Avatar
 
Join Date: Feb 2022
Location: 77.8419 S, 166.6863 E
Posts: 62

Bikes: Yes

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked 16 Times in 12 Posts
Weird Noise

OK, I've been trying to figure out this noise for the last couple weeks (this is on a different bike than what my previous questions were about). Here's what I've got:

Weird tonk/click noise when pedaling. Hard to describe it, almost has a spoke-like sound to it, or like the sound when a freewheel engages, but its not those sounds specifically.
  • Once per revolution
  • Only when pedaling
  • Only when sitting down
  • Usually on hills
  • Doesn't always happen, but often does
  • 1x9 drivetrain, no chain guard
  • SRAM PC971 chain in excellent shape
  • Shimano 9 speed freewheel in excellent shape
  • Shimano UN55 68x110 BB in excellent shape
  • Happens in different gears, derailleur is tuned well

Things checked/tried:
  • Have removed and regreased BB/cups with tri-flow
  • Checked chainring bolt tightness
  • Checked spokes/wheels are true
  • Checked flexing seat back and forth as would happen when pedaling, but no noise without pedaling
  • Flexed other potential stress points: bars, rear rack, crank arms, bottle cages, wheels. Can't reproduce sound without sitting and pedaling
  • Changed to different pedals (has half platform/half spd, happens regardless of which side used)

Not sure what else to do. Maybe barrel down a mountain and see if the frame fails catastrophically. Don't see any cracks in frame (it's steel).

If anyone wants to see specifically what the bike looks like, it's here: My Pandemic K2 Zed Sport

I did recently change the brake levers, but can't see how that could have caused the issue. Also, not 100% sure the noise started right after that, but I noticed it after that.
brokewheelspoke is offline  
Old 09-21-23, 09:03 AM
  #2  
I'm good to go!
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 14,165

Bikes: Tarmac Disc Comp Di2 - 2020

Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 5845 Post(s)
Liked 4,466 Times in 3,078 Posts
Clean your spokes where they cross. I get sweat and spilled drink mix on mine and every great once in a while they need to be cleaned to help with noises. I can pull a damp thin and strong cloth between mine and get them clean. Others just lube them with most anything that we'd argue for chain lube. Wax, paraffin and soap included.

Once a wheel revolution or once a crank revolution. Have you checked the chain ring bolts? The rotor lock ring might be loose or one of the bolts in not center lock. My rear rotor lock was loose and made a noise once per revolution.

Pedals will make a click once a crank revolution when they need attention. But I feel that click more than I hear it. Swap the pedals for some others to check that.

Are you just too finicky about wanting your mechanical beast to be quiet and stealthy? It's nice when they are, many aren't perfectly quiet and never will be with out a lot of your time and effort along with some tweaking that most wouldn't want to do regularly.
Iride01 is offline  
Likes For Iride01:
Old 09-21-23, 09:40 AM
  #3  
Senior Member
 
downtube42's Avatar
 
Join Date: Oct 2008
Location: Portland, OR
Posts: 3,713

Bikes: Trek Domane SL6 Gen 3, Soma Fog Cutter, Focus Mares AL, Detroit Bikes Sparrow FG, Volae Team, Nimbus MUni

Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 830 Post(s)
Liked 1,907 Times in 998 Posts
Where you say once per revolution, you mean pedal revolution, correct?

If so then we're talking about a noise correlated with torque spikes only while seated. Things flex under torque.

The seated non-seated difference could mean it's somewhere from BB to saddle, but could also mean torque is different when seated. Nothing definitive there.

Torque spikes can cause movement virtually anywhere in the bike. Have you tried riding beside someone, and having the listen to identify where the sound is originating?
downtube42 is offline  
Likes For downtube42:
Old 09-21-23, 10:11 AM
  #4  
Newbie
Thread Starter
 
brokewheelspoke's Avatar
 
Join Date: Feb 2022
Location: 77.8419 S, 166.6863 E
Posts: 62

Bikes: Yes

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked 16 Times in 12 Posts
Yeah, once per pedal revolution. I'll try cleaning and lightly lubing the spokes. Worth a shot.

Riding beside someone is a good idea, but everyone I knew left the state, and now I'm like that guy in the field full of holes at the start of Star Trek V.

Considered taking it to a bike shop, but skeptical they'd actually take the time to ride it and listen...afraid they'll just take a guess and say bring it back if the problem is still there.
brokewheelspoke is offline  
Old 09-21-23, 10:45 AM
  #5  
I don't know.
 
RB1-luvr's Avatar
 
Join Date: May 2003
Location: South Meriden, CT
Posts: 1,850

Bikes: '90 B'stone RB-1, '92 B'stone RB-2, '89 SuperGo Access Comp, '03 Access 69er, '23 Trek 520, '14 Ritchey Road Logic, '09 Kestrel Evoke, '08 Windsor Tourist, '17 Surly Wednesday, '89 Centurion Accordo, '15 CruX, '17 Ridley X-Night

Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 267 Post(s)
Liked 679 Times in 361 Posts
skewers tight?
RB1-luvr is online now  
Old 09-21-23, 10:48 AM
  #6  
ignominious poltroon
 
Polaris OBark's Avatar
 
Join Date: Jan 2022
Posts: 3,610
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2030 Post(s)
Liked 3,056 Times in 1,604 Posts
I just discovered a bent pedal washer can do this.
Polaris OBark is offline  
Old 09-21-23, 12:17 PM
  #7  
I'm good to go!
 
Iride01's Avatar
 
Join Date: Jul 2017
Location: Mississippi
Posts: 14,165

Bikes: Tarmac Disc Comp Di2 - 2020

Mentioned: 48 Post(s)
Tagged: 0 Thread(s)
Quoted: 5845 Post(s)
Liked 4,466 Times in 3,078 Posts
Originally Posted by brokewheelspoke
...afraid they'll just take a guess and say bring it back if the problem is still there.
That's all we can do. Of course you can't bring it back, but you can tell us it wasn't what we thought it might be.
Iride01 is offline  
Old 09-21-23, 12:25 PM
  #8  
Senior Member
 
Trakhak's Avatar
 
Join Date: Jan 2005
Location: Baltimore, MD
Posts: 4,773
Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 2085 Post(s)
Liked 2,423 Times in 1,376 Posts
If you have another bike with compatible parts, try swapping parts between the two, one at a time.

I'd start with the easy stuff---swap seat and seatpost assemblies (if the noise goes with the seat and seatpost, you can then narrow it down to which is responsible), swap one wheel, swap the other wheel, etc.
Trakhak is offline  
Old 09-21-23, 12:33 PM
  #9  
Senior Member
 
ljsense's Avatar
 
Join Date: Sep 2009
Location: Madison, Wis.
Posts: 746
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 280 Post(s)
Liked 144 Times in 88 Posts
Since it only happens when seated, I'd start by removing your seatpost and saddle, cleaning them, and greasing the seatpost.

I'd look at how tight the Brooks saddle tension is, and inspect the rivets. Spread leather treatment around where the saddle frame attaches. You don't need a lot of tension in a Brooks saddle, but the tension bolt and nut should not be loose and free to spin.

Reinstall the saddle and make sure the saddle rails are clean and clamped well. A rider exerts more force on a saddle than is easy to replicate by hand.

While you're at it, remove that little plastic bracket that is on the seatpost close to the frame. I can't tell if it's touching the top of the seat tube collar, but you might as well take it off because it's one more easy thing to rule out.

If that doesn't work, I'd try removing your entire rear rack and bag -- that's a system with a fair amount of complexity and attachment points and it's easy to rule out as a cause by simply removing it and taking your bike for a ride.
ljsense is offline  
Likes For ljsense:
Old 09-21-23, 02:39 PM
  #10  
Senior Member
 
Troul's Avatar
 
Join Date: Oct 2013
Location: Mich
Posts: 6,989

Bikes: RSO E-tire dropper fixie brifter

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 2,781 Times in 1,797 Posts
tightly wrap electrical tape around the seat post/tube/&clamp then take it for a loaded spin. If you notice a significant noise change, it'd heavily focus in that area, if not, then undo the tape & move on to dropping fresh wax/lube onto the rear der & testing that out with a load ride.
__________________
-Oh Hey!
Troul is offline  
Old 09-22-23, 11:41 AM
  #11  
Insane Bicycle Mechanic
 
Jeff Wills's Avatar
 
Join Date: Mar 2008
Location: other Vancouver
Posts: 9,748
Mentioned: 34 Post(s)
Tagged: 0 Thread(s)
Quoted: 759 Post(s)
Liked 626 Times in 337 Posts
I had a bike do that and it drove me nuts figuring out what it was. Eventually I removed the pedals, cleaned the threads, and applied new grease to the threads. Reinstalled the pedals and all was quiet.

Weird.
__________________
Jeff Wills

Comcast nuked my web page. It will return soon..
Jeff Wills is offline  
Old 09-22-23, 12:42 PM
  #12  
Senior Member
 
Kontact's Avatar
 
Join Date: Apr 2011
Posts: 6,094
Mentioned: 41 Post(s)
Tagged: 0 Thread(s)
Quoted: 3731 Post(s)
Liked 1,055 Times in 701 Posts
That's a huge amount of exposed seat post. Try a different saddle, or try lowering the post for diagnostics.
Kontact is offline  
Likes For Kontact:
Old 09-22-23, 01:22 PM
  #13  
Full Member
 
AndreyT's Avatar
 
Join Date: Nov 2011
Location: CA
Posts: 495
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 244 Post(s)
Liked 55 Times in 30 Posts
Originally Posted by brokewheelspoke
Weird tonk/click noise when pedaling. Hard to describe it, almost has a spoke-like sound to it, or like the sound when a freewheel engages, but its not those sounds specifically.
  • Once per revolution
  • Only when pedaling
An obvious bit of crucially important information is missing: is it consistently associated with a specific position of the cranks during the revolution? Does it seem to be associated with you applying force to a specific pedal?
AndreyT is offline  
Likes For AndreyT:
Old 09-22-23, 05:53 PM
  #14  
Senior Member
 
Join Date: Jan 2019
Location: Toledo Ohio
Posts: 1,382

Bikes: 1964 Huffy Sportsman, 1972 Fuji Newest, 1973 Schwinn Super Sport (3), 1982 Trek 412, 1983 Trek 700, 1989 Miyata 1000LT, 1991 Bianchi Boardwalk, plus others

Mentioned: 19 Post(s)
Tagged: 0 Thread(s)
Quoted: 527 Post(s)
Liked 607 Times in 341 Posts
I second the pedals. I had one that the bearings were just barely on the loose side. It wasn’t enough even to alarm me. After fighting a strange noise for awhile, I noticed the pedal and readjusted the bearings and noise gone.
sd5782 is online now  
Old 09-24-23, 04:32 AM
  #15  
Senior Member
 
Join Date: Apr 2019
Location: UK
Posts: 635
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 301 Post(s)
Liked 168 Times in 131 Posts
Originally Posted by Kontact
That's a huge amount of exposed seat post. Try a different saddle, or try lowering the post for diagnostics.
Surprised its not beyond the safety limit. Got one like that but its a long post in a 60cm frame.
choddo is online now  
Old 09-24-23, 07:21 AM
  #16  
Sock Puppet
 
Lombard's Avatar
 
Join Date: Oct 2022
Location: Planet Earth
Posts: 1,698

Bikes: 2014 Cannondale Synapse Carbon, 2017 Jamis Renegade Exploit and too many others to mention.

Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 1030 Post(s)
Liked 861 Times in 571 Posts
I'm voting for the seatpost.
Lombard is offline  
Old 09-24-23, 10:26 PM
  #17  
Sr Member on Sr bikes
 
_ForceD_'s Avatar
 
Join Date: Jul 2015
Location: Rhode Island (sometimes in SE Florida)
Posts: 2,204

Bikes: Several...from old junk to new all-carbon.

Mentioned: 12 Post(s)
Tagged: 0 Thread(s)
Quoted: 960 Post(s)
Liked 698 Times in 373 Posts
Front derailleur cable excess bent out and shoe/leg/foot hitting it, and deflecting and hitting the frame?

Dan
_ForceD_ is offline  
Old 09-25-23, 05:31 AM
  #18  
Newbie
Thread Starter
 
brokewheelspoke's Avatar
 
Join Date: Feb 2022
Location: 77.8419 S, 166.6863 E
Posts: 62

Bikes: Yes

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 34 Post(s)
Liked 16 Times in 12 Posts
Thanks for the replies. A few things suggested were already addressed in the initial post e.g. changing pedals, and some things were not applicable e.g. front derailleur on a 1x9 drivetrain, but I've gone through and taken action on other things that were brought up:
  • oiled the spoke xover points (3n1 oil)
  • pulled the seat post, cleaned, oiled retention bolt, lightly oiled post (maybe should use triflow instead?)
  • checked saddle mount, tightness
  • loosened skewers, oiled, re-tightened
  • loosened rack bolts, oiled, re-tightened
Someone asked about the position of the crank when the noise happens. If you're looking at the non-drive side, it's when the crank arm is around the 7 o'clock position.
Someone asked about seat post length...it extends a good inch under the bottom of the Sheldon Brown sticker.

Have not had a chance to test ride yet since it's not something I can check effectively riding in the parking lot, so will wait until my next store ride. Been riding my other bikes, checking for noises on them, and they're pretty much dead silent in every way that matters to me. Someone asked if the noise really mattered that much, and eh...I mean it doesn't make it unrideable, but it's a challenge that must be addressed. We cannot let the noises defeat us.
brokewheelspoke is offline  
Likes For brokewheelspoke:
Old 09-25-23, 09:41 AM
  #19  
Senior Member
 
grumpus's Avatar
 
Join Date: Apr 2016
Posts: 749
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 283 Post(s)
Liked 246 Times in 194 Posts
Originally Posted by Polaris OBark
I just discovered a bent pedal washer can do this.
I've had a creak in the left pedal area of one of my bikes for a while, I removed the pedal and checked the cone/locknut was tight and adjusted and turning smoothly, removed cleaned and replaced the crank, ditto bbkt lockring, greased and tightened the pedal. So everything is clean, greased where appropriate and properly torqued. I'll have to look at the pedal washer - was yours obviously deformed? I'd have thought that between the pressure from the pedal thread and malleability of the crank that it would just spring and bed in. My crank is slightly chewed where the pedal was previously fitted without a washer, but this creak really feels and sounds like it's in the actual pedal. I suppose another possibility is that the bearing cup is moving in the pedal body.
grumpus is offline  
Old 09-25-23, 10:04 AM
  #20  
Senior Member
 
Join Date: Apr 2017
Posts: 578
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 243 Post(s)
Liked 108 Times in 64 Posts
You can buy cheap pedals - pedals you wouldn't want to use - at Mallwart (etc.) to test if it's the pedals. I've had aiguillette slap: the tips of shoelaces hitting the shoes. I've had knee click. I just participated in a thread about it Knee clicking . Loose spokes can cause clicking.
Arthur Peabody is offline  
Old 09-25-23, 10:20 AM
  #21  
ignominious poltroon
 
Polaris OBark's Avatar
 
Join Date: Jan 2022
Posts: 3,610
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2030 Post(s)
Liked 3,056 Times in 1,604 Posts
Originally Posted by grumpus
was yours obviously deformed?​​
Yes.

​​​​​I'd have thought that between the pressure from the pedal thread and malleability of the crank that it would just spring and bed in. My crank is slightly chewed where the pedal was previously fitted without a washer, but this creak really feels and sounds like it's in the actual pedal. I suppose another possibility is that the bearing cup is moving in the pedal body.
I just assumed the pedal was destroyed. I was surprised to find a bent washer.
Polaris OBark is offline  
Old 09-25-23, 11:15 AM
  #22  
Senior Member
 
grumpus's Avatar
 
Join Date: Apr 2016
Posts: 749
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 283 Post(s)
Liked 246 Times in 194 Posts
Originally Posted by Polaris OBark
I just assumed the pedal was destroyed. I was surprised to find a bent washer.
I'll have a look, and fit a new one anyway if I can find them - am I the only person who buys ten washers, uses a couple then misplaces the rest and has to buy more? Probably.
grumpus is offline  
Old 09-25-23, 11:27 AM
  #23  
ignominious poltroon
 
Polaris OBark's Avatar
 
Join Date: Jan 2022
Posts: 3,610
Mentioned: 3 Post(s)
Tagged: 0 Thread(s)
Quoted: 2030 Post(s)
Liked 3,056 Times in 1,604 Posts
Originally Posted by grumpus
am I the only person who buys ten washers, uses a couple then misplaces the rest and has to buy more?
Nope.

Unfortunately, I think there are some very cheaply made ones. I'm also unclear if they do any good. I have no idea why mine deformed. The pedal wasn't that tightly attached (I just put it on for a bike on a trainer). If anything, it was too loose maybe.
Polaris OBark 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
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell or Share My Personal Information -

Copyright © 2023 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.