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-   Clydesdales/Athenas (200+ lb / 91+ kg) (http://www.bikeforums.net/clydesdales-athenas-200-lb-91-kg/)
-   -   They squeal like a piggy on a spit (http://www.bikeforums.net/clydesdales-athenas-200-lb-91-kg/562985-they-squeal-like-piggy-spit.html)

bautieri 07-16-09 11:44 AM

They squeal like a piggy on a spit
 
Got a Q for the mechanically inclined.

I got a set of linier pull brakes (V-brakes) that squeal horribly with the front being considerably worse. Research has indicated that I should "toe-in" the brake pads. To do so I intend on using a shim of some sort but I was wondering if it really is as simple as loosening the bolt that holds the pad to the arm, shimming the pad out, then retightening. It would seem to me that the act of retightening would square the pad back out to its current position. If anyone has any suggestions I would sure appreciate it. Any thoughts on what else it could be? The rims are brand new as are the brake pads, pad position on the rim appears to be proper.

Jeff Wills 07-16-09 12:29 PM

Quote:

Originally Posted by bautieri (Post 9292193)
Got a Q for the mechanically inclined.

I got a set of linier pull brakes (V-brakes) that squeal horribly with the front being considerably worse. Research has indicated that I should "toe-in" the brake pads. To do so I intend on using a shim of some sort but I was wondering if it really is as simple as loosening the bolt that holds the pad to the arm, shimming the pad out, then retightening. It would seem to me that the act of retightening would square the pad back out to its current position. If anyone has any suggestions I would sure appreciate it. Any thoughts on what else it could be? The rims are brand new as are the brake pads, pad position on the rim appears to be proper.

You might get better answers on the "Mechanics" forum, but, yes- it is as simple as that. Here's a good start: http://parktool.com/repair/readhowto.asp?id=21

V-brake squeal is a common issue. Other causes are:

1.Contaminated pads and/or rims (clean thoroughly, finishing with alcohol)
2. poor surface finish (smooth with Scotch-Brite pad)
3. loose fitting brake pivots (not much you can do- swap the brakes or the bike)


I've had a couple different bikes that squealed horribly after I put on Kool-Stop salmon colored pads and brand-new Velocity rims. The squeal went away when I switched to Kool-Stop black pads. After the rims wore in a bit, I switched back to the salmon pads and they didn't squeal.

Tom Stormcrowe 07-16-09 12:48 PM

Well, you could use the solution I used on my Nishiki......
I "Fixed" it. (Went Fixed Gear and never touch the remaining front brake, ever....it's there for show only. ;) )

http://www.bikeforums.net/picture.ph...1&pictureid=78

CliftonGK1 07-16-09 12:52 PM

You shouldn't need a shim for the pad holder adjustment. Loosen the retaining screw and the pads are mounted via a spherical washer to allow for 360-degree adjustment of the pad angle, assuring you get appropriate toe-in along with correct angle of contact to the braking surface of the rim.

If it's an issue with the pivots being loose and allowing the entire armature to shudder, then there's not much you can do about that.

mtclifford 07-16-09 01:04 PM

As a West Virginian, I was pretty terrified to open this thread.

bautieri 07-16-09 01:14 PM

Quote:

Originally Posted by Tom Stormcrowe (Post 9292792)
Well, you could use the solution I used on my Nishiki......
I "Fixed" it. (Went Fixed Gear and never touch the remaining front brake, ever....it's there for show only. ;) )

http://www.bikeforums.net/picture.ph...1&pictureid=78

It's tempting but I am hessitent to fixify a brand new $1500 bike.

Snazzy Nishiki btw :thumb:

Thanks for the suggestions, I'm going to try and toe the pads in before my ride tonight. If it works awesome, if not...well...she's almost ready for her 300 mile tune up and it can be the shop's problem. If it ends up being shuddering arms then I am going to toss the whole V-brakes for a nice set of canti's. God I hate that travel agent with a passion matched only by my hated of Necco Waffers.

CliftonGK1 07-16-09 01:24 PM

Quote:

Originally Posted by bautieri (Post 9293080)
If it ends up being shuddering arms then I am going to toss the whole V-brakes for a nice set of canti's.

Don't read the CX brakes thread over on the Commuting forum! :lol: There's a lot of smack talk going on over there about cantis vs. Vs vs. discs, and how cantis may as well be worse than just trying to reach down and grab your spokes as far as braking is concerned.
Personally, I love my canti brakes and wouldn't switch for anything.

bautieri 07-17-09 05:29 AM

Adjusting the toe did the trick, no more sqealing

It's been my observation that properly adjusted canti's will stop you just as well as anything else. V brakes paired up with STI brifters however is teh suck.

Hill-Pumper 07-17-09 08:45 AM

Quote:

Originally Posted by bautieri (Post 9297231)
Adjusting the toe did the trick, no more sqealing

It's been my observation that properly adjusted canti's will stop you just as well as anything else. V brakes paired up with STI brifters however is teh suck.

I would love to say that is always the case, but the Avid Shorty 4's that came on my Jake are less then desirable for stopping power. I knew that going in because of some of the reviews here on BF. I am upgrading to Tektro CR720 canti's with Kool-Stop black MTB pads. I hope that does the trick. :(

Missbumble 07-17-09 08:50 AM

All I have to say is the title of the thread is enough to make me a vegetarian ...the pooor lil piggy.

aidanpryde18 07-17-09 09:04 AM

Missbumble, if it makes you feel any better, in my experience, the pig is usually dead before it gets put on the spit.

That and barbecue tastes waaay too good to ever give up.

CliftonGK1 07-17-09 09:04 AM

Quote:

Originally Posted by bautieri (Post 9297231)
Adjusting the toe did the trick, no more sqealing

It's been my observation that properly adjusted canti's will stop you just as well as anything else. V brakes paired up with STI brifters however is teh suck.

Did you put a travel agent on that setup? V-brakes require different pull than traditional cantis or road brakes, that's why you need special V-brake drop bar levers or you need to use a travel agent pulley to get the appropriate pull.

Tex_Arcana 07-17-09 09:11 AM

Don't worry Miz Bee.

No one really puts live pigs on spits, and dead pigs don't squeal.

bautieri 07-17-09 10:52 AM

Quote:

Originally Posted by Missbumble (Post 9298155)
All I have to say is the title of the thread is enough to make me a vegetarian ...the pooor lil piggy.

Don't worry Miss B, this will reel you back over to omnivore side:

http://www.morgansbbq.co.uk/photos/pig_1.jpg

*drools

bautieri 07-17-09 10:54 AM

Quote:

Originally Posted by CliftonGK1 (Post 9298227)
Did you put a travel agent on that setup? V-brakes require different pull than traditional cantis or road brakes, that's why you need special V-brake drop bar levers or you need to use a travel agent pulley to get the appropriate pull.


Yeah, I have a set of travel agents. I think I may have made a mistake by having the cross levers removed. They annoyed me and took up space that was much better utilized by a computer and headlight.

txvintage 07-17-09 03:50 PM

Quote:

Originally Posted by mtclifford (Post 9292964)
As a West Virginian, I was pretty terrified to open this thread.

Oh come on. Deliverance was one of the greatest love stories evar!:eek:


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