Canti Chatters, Screeching.

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Blakey
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(Reply to #51)

Dirty Sanchez wrote:
You could just buy a CX8.4 or other fancy mini-v for the front instead of trying to repurpose cheapo BMX jawns

Awww shiit. That's the one significant detail I'd overlooked, the TRP model moves the pad slot axis away from the base of the canti stud.

Shame the TRP are only sold in pairs.


Tue, 01/01/2013 - 18:14
Blakey
Blakey's picture

And the followup, here for posterity and google-fu.

How to fit Tektro 926 AL 80mm mini v brakes to an Alpha Q CX20 fork:

Turns out the shortest arm mini v's (Tektro 926AL, 80mm) have the pad slot quite far back, which wouldn't be an issue if my fork (Alpha Q CX20) didn't have so much carbon around the studs. If TRP made a CX8 model I'd have bought that, but no such luck.

So I filed the brake pad slot away until the arm nearly cleared my fork, added a 1mm washer underneath the canti stud and finally the arms didn't foul the fork.

But then I had to trim the brake pad washers down because they hit too. Then I chose between four different kids of brake cartridge to minimise the distance between pad face and back side and maximise the amount the arm can retract.

Then, just when I thought I was done, I discovered that the bushings were proud of the stud, so when you tighten the bolt, the arm binds. So I lapped those back too.


Complete photoset:
http://www.flickr.com/photos/ah_blake/sets/72157632446746441/with/8353285016/

Edit: Photo privacy settings fixed.

Mon, 01/07/2013 - 02:51
tehschkott
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Well that sucks. I think you're on the right path - it's what I would have done. File some material off and use a few washers. Not much else to do.

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Mon, 01/07/2013 - 21:03
eric_ssucks
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Put some black tektro pads on instead of the kool stop salmon pads. Chatter, screeching problem solved until the pads wear in. I'm going to clean the rims and pads more often, too, though this just means more than once every 3 months.

Sat, 03/16/2013 - 15:43
m4bandit
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I'll never rid my Shortys of the horrid screech. On the plus side, it acts like an automatic spencer bell to get people out of the way on the multi use path.

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Sun, 03/17/2013 - 22:54
mander
mander's picture

My xcheck utterly shut the fuck up after installing 720s a couple years back. No toe in, rim cleaning or other shenanigans necessary, ever. Could never get shorty 4s or the shimano 5xx's to stop shrieking like a baby elephant getting tortured.

Sat, 04/06/2013 - 00:51
Blakey
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Halp.

rSogn & Haulin Colin rack, Shimano BR-R550 (low pro canti), CX cartridges, kool stop salmon pads, stem hanger, straddle as low as possible, Synergy laced to SONdelux, VO Zeppelin fender, Chorus 11sp shakes.

Screeches and resonates through the rack like a banshee. Braking power is fine.

I've cleaned the rim, filed the pads, toed it in, but that has no effect. Where should I start in trying to quell the squeal?

Wed, 03/05/2014 - 22:55
The RTS
The RTS's picture

Mini-V's or fork crown mounted hanger

Wed, 03/05/2014 - 23:09
Blakey
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both unpossible.

minis don't clear fenders, hanger is blocked by rack to crown rod.

Wed, 03/05/2014 - 23:16
deadforkinglast
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Yeah, you're fucked.

Wed, 03/05/2014 - 23:35
Orc
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(Reply to #61)

Regular Vs + a travel agent?

Wed, 03/05/2014 - 23:41
circuithero
circuithero's picture

Try backing out one of the pad bolts a hair. Sometimes it will change the screeching to a frequency you can't hear. It's worked before. It's failed before.

Wed, 03/05/2014 - 23:47
Blakey
Blakey's picture
(Reply to #63)

Orc wrote:
Regular Vs + a travel agent?

I don't want to go this route, but might have to.

circuithero wrote:
Try backing out one of the pad bolts a hair. Sometimes it will change the screeching to a frequency you can't hear. It's worked before. It's failed before.

Hrm, will reup the loctite and try that.

Wed, 03/05/2014 - 23:58
chenghiz
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90mm mini-vs clear hell of fenders. You sure that wouldn't work? 650b conversion?

Thu, 03/06/2014 - 00:02
Blakey
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(Reply to #65)

chenghiz wrote:
90mm mini-vs clear hell of fenders. You sure that wouldn't work? 650b conversion?

rSogn = 42mm hetres and fenders over that.

Thu, 03/06/2014 - 00:11
JUGE FREDD
JUGE FREDD's picture
(Reply to #66)

Blakey wrote:
rSogn & Haulin Colin rack, Shimano BR-R550 (low pro canti), CX cartridges, kool stop salmon pads, stem hanger, straddle as low as possible

ditching salmon and/or using the v-brake padholders they came with will help immensely

Blakey wrote:
Screeches and resonates through the rack like a banshee

shouldn't be able to do that, might try using washers on both sides of the fork crown to square things up

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Thu, 03/06/2014 - 00:25
eric_ssucks
eric_ssucks's picture

Another vote for ditching the salmon. I got some cheapass tektro black pads that work pretty OK, as long as I don't actually need to stop. Next step, V-brak pad holders.

Thu, 03/06/2014 - 00:49
Blakey
Blakey's picture
(Reply to #68)

match avatar wrote:
ditching salmon and/or using the v-brake padholders they came with will help immensely

shouldn't be able to do that, might try using washers on both sides of the fork crown to square things up

I recall it being pretty square when I fitted it, but I'll slacken it all off and see.

I'd improved braking performance going from MTB to CX carts with cantis in the past, I'll downgrade after the rack rebolt and try that too.

Been living with it for too long, time to banish the noise.

Thu, 03/06/2014 - 00:54
VT regularbike
VT regularbike's picture
(Reply to #69)

match avatar wrote:
Blakey wrote:
rSogn & Haulin Colin rack, Shimano BR-R550 (low pro canti), CX cartridges, kool stop salmon pads, stem hanger, straddle as low as possible

ditching salmon and/or using the v-brake padholders they came with will help immensely

Blakey wrote:
Screeches and resonates through the rack like a banshee

shouldn't be able to do that, might try using washers on both sides of the fork crown to square things up

Wasn't there a version of this rack that had a brazed on cable hanger? Do that?

Miguel wrote:
i mean as long as we're spending money, lets just set the wallet on fire ok

Thu, 03/06/2014 - 01:46
jimmythefly
jimmythefly's picture

Sounds like your rack needs zertz inserts.

Fill rack with expanding foam through vent holes?

deadforkinglast wrote:
But honestly, I have no idea how I am going to follow through on that plan and I already have a pretty rad spencer. I think I just like fucking with my bikes.

Thu, 03/06/2014 - 01:47
Blakey
Blakey's picture

I wish, that was fred's prototype.

Thu, 03/06/2014 - 01:48
VT regularbike
VT regularbike's picture

I always wanted to try that with a powerdome cassette to see how much it would quite it down. Never got around to it though

Miguel wrote:
i mean as long as we're spending money, lets just set the wallet on fire ok

Thu, 03/06/2014 - 01:59
halbritt
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Ted shred.

...shift like jesus making one set of footprints in the sand in your time of need

Thu, 03/06/2014 - 12:26
Blakey
Blakey's picture

Turns out I had stock TRP refills in the CX carts, not salmons.

Anyway, long mtb style shimano carts with non salmons = squeal when wailing on the brakes, so it's kicking in later. rack is bolted up square, with a washer at the back, everything tight. See how that goes for a while.

Sat, 03/08/2014 - 03:50
Larry Winget
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Wheel true and dishing spot on?

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Sat, 03/08/2014 - 12:17
kmcdon
kmcdon's picture

put new salmons on 2 bikes this week, shit stops nice, I still think cantis are the best looking brakes and am willing to deal with the bullshit some of the time.

that's all.

Thu, 11/09/2017 - 01:00
Tail Hook Lengthener
Tail Hook Lengthener's picture

I love cheap Altus brakes with Salmon pads. Great modulation and good stopping power, even in the rain. Doubtful I'd build a new spencer around such a setup, but such setups work great on any old mountain or cyclocross spencer.

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Thu, 11/09/2017 - 01:17
shane.rrr
shane.rrr's picture

I use salmon pads and don't squeal unless they aren't toed in and aligned correctly. My front squeals right now but I haven't bother fixing it yet.

I was trying to find this video that @hobocross on instagram posted. It was of his wife/gf/partner riding towards the camera with canti brakes squealing and the video was titled "The song of my people"

Thu, 11/09/2017 - 08:31
kmcdon
kmcdon's picture

I'm not sure which brakes LB has on her diamondback citybike, but they have these awesome rotating washers that are there for adjusting the toe. It makes it leagues easier to get it right the first time, every time. I might actually see if I can find some at the co-op to build some frankencantis on my univega. I'll be keeping the dia-compe arms because they're sw8, but if I can transplant that washer it'd be pretty nice.

Thu, 11/09/2017 - 11:45
shane.rrr
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I would like this washer. Adjusting cantis are always the worst part about cantis

Thu, 11/09/2017 - 12:14
kmcdon
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(Reply to #81)

shane.rrr wrote:
I would like this washer. Adjusting cantis are always the worst part about cantis

So Jan makes these https://www.compasscycle.com/shop/components/angled-brake-washer-pair/

But, they're set at 2.5 deg. and not adjustable. The shimano ones are tapered and as you rotate the washer, the toe angle changes.


These are the brakes that she has, you can see the black washer with a little tab on it right behind the post of the brake pad holder, that's what you rotate. It's awesome.

Thu, 11/09/2017 - 12:26
Blakey
Blakey's picture

As soon as you mentioned the toe washer, I figured you were referring to those old shimano wide profile cantis. They are a great (canti) brake available in a few spec levels, BR-MT62 is deore II, BR-M732 for XT.

Thu, 11/09/2017 - 17:15
shane.rrr
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Hmm, too bad some other manufacturers don't see that design their own version.

Mon, 11/13/2017 - 11:35
cousinmosquito
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(Reply to #84)

shane.rrr wrote:
Hmm, too bad some other manufacturers don't see that design their own version.

These guys did. It was a while ago now but.

I recently went from shimano sti levers to the TRP RRL levers, and they increased the power of that rear canti by at least 40%.
Last weekend I swapped them out for some Sram red 10 speed levers, which will ultimately go on my CX spencer in a 1x format I think.

The Sram Red has boosted the front brake substantially, (1st gen BB7) but the rear (as shown above) is now purely decorative.

I have some of the low profile XTR cantis I could try if I can be arsed.
Does anyone know how well the XTR go with Sram Red?

Mon, 11/20/2017 - 16:16

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