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

Brake squeak

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.

Brake squeak

Old 02-01-17, 09:36 PM
  #1  
Full Member
Thread Starter
 
Join Date: May 2012
Location: Atlanta, GA
Posts: 339

Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Brake squeak

Is there room for one more post about squealing brakes? I got a set of Paul touring cantis that shipped with Kool Stop pads that are maybe 3 inches long, longest I've ever seen, so long that when the arms are released, the pads hit the forks, preventing them from opening all the way. Another interesting feature on these pads is that the working surface is not flat. The rear of the pad is wedge shaped, angling in towards the rim such that the back of the pad will contact the rim first. I assumed that design would force the pad to toe in when fully engaged, neat idea. But the front pads squeal so loud that it scares motorists and makes dogs run for cover. I have tried rubbing alcohol on the pads and rims as well as toe in adjustments and scuffing the rim with an abrasive pad, no luck. I stopped by an lbs and they toed them in at such a steep angle that only the front third of the pads could make contact, that fixed the squeal, but surely that isn't right. Normally when I install pads, I place them against the rim with a dime under the rear of the pad to get a slight angle, but these already have that wedge thing in the rear. The rear set is fine, just the front ones squeal. Any ideas before I scrap them? Thanks!
byrd48 is offline  
Old 02-01-17, 09:56 PM
  #2  
Junior Member
 
Join Date: Jan 2017
Posts: 14
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Which kool stop pads? salmon? black? salmon/black?
trentb1 is offline  
Old 02-01-17, 10:13 PM
  #3  
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,320

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1439 Post(s)
Liked 1,094 Times in 724 Posts
Originally Posted by byrd48
...the front pads squeal so loud that it scares motorists and makes dogs run for cover
That sounds like a great safety feature! Replaces both a horn and pepper spray. ;o)
dsbrantjr is offline  
Old 02-01-17, 10:13 PM
  #4  
Full Member
 
Join Date: Feb 2005
Posts: 356
Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 31 Post(s)
Likes: 0
Liked 1 Time in 1 Post
to mention the obvious... try a different pair of pads, or better yet sand down the pads
acorn54 is offline  
Old 02-01-17, 10:23 PM
  #5  
Full Member
Thread Starter
 
Join Date: May 2012
Location: Atlanta, GA
Posts: 339

Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by trentb1
Which kool stop pads? salmon? black? salmon/black?
Salmon, thin and long
byrd48 is offline  
Old 02-01-17, 10:30 PM
  #6  
Full Member
Thread Starter
 
Join Date: May 2012
Location: Atlanta, GA
Posts: 339

Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by acorn54
to mention the obvious... try a different pair of pads, or better yet sand down the pads
I have sanded pads before, but these are not flat due to that wedge in the rear. Maybe I will swap the front and rear and see if that helps. These Paul cantis are also different from any that I've had before. They don't seat all the way down on the post and the spring is in front of the arm where most are behind, over the larger diameter of the post. I wonder if that setup is more vibration prone. The previous brakes were Shimano cx50, which were half the price and did not have replaceable pads, but Shimano tends to know how to make stuff I suppose..
byrd48 is offline  
Old 02-02-17, 07:43 AM
  #7  
Senior Member
 
Join Date: Aug 2005
Location: Pittsburgh, PA
Posts: 33,656

Bikes: '96 Litespeed Catalyst, '05 Litespeed Firenze, '06 Litespeed Tuscany, '20 Surly Midnight Special, All are 3x10. It is hilly around here!

Mentioned: 39 Post(s)
Tagged: 0 Thread(s)
Quoted: 2026 Post(s)
Likes: 0
Liked 1,096 Times in 742 Posts
After all else failed (absurd toeing, super cleaning of everything, etc.) I managed to "silence" a front Avid SD-7 V-brake by replacing the OEM style pads with Kool Stop Salmon road pads in Dura-type holders. The road pads were much shorter but they ran quietly and braking performance wasn't compromised.

I had the same noise with both Avid's OEM and Kool Stop's direct replacement pads but the road pads worked.
HillRider is offline  
Old 02-02-17, 10:11 AM
  #8  
Me duelen las nalgas
 
canklecat's Avatar
 
Join Date: Aug 2015
Location: Texas
Posts: 13,513

Bikes: Centurion Ironman, Trek 5900, Univega Via Carisma, Globe Carmel

Mentioned: 199 Post(s)
Tagged: 0 Thread(s)
Quoted: 4560 Post(s)
Liked 2,804 Times in 1,801 Posts
I use those same pads on my mountain bike's cantilever rear brakes, the Eagle 2 pads. Great grip, no noise on slightly concave aluminum rims. The wedge takes the fuss out of toe in.

I switched the front to Jagwire black pads, not because I was dissatisfied with the Kool Stop braking but because the clearance was too tight for the wheel with an inflated tire. The Jagwire pads are longer but thinner, narrower and a better match to these Araya rims with concave surface. No noise.
canklecat is offline  
Old 02-02-17, 02:00 PM
  #9  
Full Member
Thread Starter
 
Join Date: May 2012
Location: Atlanta, GA
Posts: 339

Bikes: Dave Kirk Custom, Clockwork Bikes Custom, Batavus Course Specialized HardRock x2 Trek 700 MultiTrack 1991 Trek 950 SingleTrack. Miyata Three Ten

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 37 Post(s)
Likes: 0
Liked 1 Time in 1 Post
Originally Posted by HillRider
After all else failed (absurd toeing, super cleaning of everything, etc.) I managed to "silence" a front Avid SD-7 V-brake by replacing the OEM style pads with Kool Stop Salmon road pads in Dura-type holders. The road pads were much shorter but they ran quietly and braking performance wasn't compromised.

I had the same noise with both Avid's OEM and Kool Stop's direct replacement pads but the road pads worked.
That is encouraging, thanks!
byrd48 is offline  
Old 02-02-17, 02:01 PM
  #10  
Senior Member
 
DEW21's Avatar
 
Join Date: Sep 2012
Location: Motor City
Posts: 262

Bikes: 2012 Giant Escape, 199? Specialized HardRock

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 40 Post(s)
Likes: 0
Liked 0 Times in 0 Posts
Check and adjust wheel bearing endplay and fork bearing play!
DEW21 is offline  
Old 02-02-17, 02:53 PM
  #11  
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 8,320

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 30 Post(s)
Tagged: 0 Thread(s)
Quoted: 1439 Post(s)
Liked 1,094 Times in 724 Posts
Cantilever brakes and the front one squeals sounds like brake shudder caused by a stem- or headset-mounted cable hanger: Technical Q&A with Lennard Zinn: How to stop cyclocross brake chatter | VeloNews.com
https://re-turn.blogspot.com/2009/08...k-chatter.html

A fork-crown-mounted hanger will remove the root cause of the problem. Sanding, toe-in do not address that cause.
https://www.amazon.com/Tektro-Front-.../dp/B006GHDRYC
I have the ones made by Specialized but they no longer seem to be available.
dsbrantjr is offline  
Old 02-03-17, 08:29 PM
  #12  
Senior Member
 
Join Date: Jan 2017
Posts: 103
Mentioned: 2 Post(s)
Tagged: 0 Thread(s)
Quoted: 60 Post(s)
Likes: 0
Liked 2 Times in 2 Posts
Is there room for one more post about squealing brakes? NO
RoadieDropper is offline  
Related Topics
Thread
Thread Starter
Forum
Replies
Last Post
wernst
Bicycle Mechanics
15
10-17-18 11:58 PM
FatBottomedGirl
Bicycle Mechanics
3
06-13-13 05:12 AM
Maukaman
Bicycle Mechanics
19
04-15-13 02:31 PM
Fleetdog
Bicycle Mechanics
22
03-12-10 01:43 PM
Jude
General Cycling Discussion
7
03-06-10 03:21 PM

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 -

Copyright © 2024 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.