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squealing rear brake?(9 posts)

squealing rear brake?damon
Nov 15, 2003 6:56 PM
This is a long shot, but i thought i'd see if there were more tricks on what i can do to quiet my rear cantilever brake.

Bike: Bianchi Reparto Corse '99, campy record (old school - FW) hubs, 36x, MA3 rims, and various brakes.

Of course i've tried different toe in settings (in, out, flat), and i've also tried several different brake pads (koolstop EC1, EC2 - both black and salmon, and WTB dual compound), even tried several different brakes (dia compe 986, XTR, WTB, suntour XC-Pro SE).

For a while, the rear brake was silent with XTR cantis and eagle claw1 pads, but that has stopped being effective. About the only two things i have changed are the rear wheel and the frame... how likely are one of these to contribute to the propensity for squeak? Cleaning the rim with acetone and scrubbing it with steel wool made a difference for about a mile... I wouldn't mind getting a new wheel, anyway, but what i have works quite well (except for the audible annoyance).

Anyway, a long (shot) post to see if there are any good suggestions/recommendations out there...

re: squealing rear brake?atpjunkie
Nov 17, 2003 12:53 PM
I have a new set of tubie wheels that squeal hooribly, the front causes a stutter that shakes the headset loose. I thought it was maybe in the set up (was a bike rebuild) but the set up is fine with my clinchers. I have a new set of 'squeal free' pads I'm going to try. I'll post the results and then I just have to figure where you can get them. I have a connection here, if they work and we can't find a national distributor.
re: squealing rear brake?damon
Nov 17, 2003 6:47 PM
interesting... squeal free pads? You don't mean old shimano XT cartridges, do you? Of course, those were stop-free, and long-life free, too...

Yeah, let me know on those. I'd be willing to sacrifice a little braking power since it is only on my rear brakes.

re: squealing rear brake?flyweight
Nov 17, 2003 3:37 PM
Is it an older gray anodized rim? If so, that's probably your problem. I built up a set of wheels using Mavic Mach2 tubular rims and had horrible problems with the brakes squealing. If I switched wheels the problem disappeared. Eventually the gray anodizing wore off and the Mach2 rims stopped squealing. I'd suggest trying another rear wheel.
re: squealing rear brake?damon
Nov 17, 2003 6:48 PM
No, it is a somewhat newer rim with machined sidewalls. The machining grooves are all but worn away, though.

I'll have to see if i can find another wheel to play with for experimentations sake, i guess...

grey rimsatpjunkie
Nov 18, 2003 12:07 PM
yes, mine are the 90's era Rigida SH semi aeros with grey sidewalls. I'm going to acetone and steel wool the braking surface. RE: the squeal free brakes, nope not Shimano, they are either Eastern European or Asian made for a Euro company. Text is German (I think) but have a squeal free guarantee on the box. I'll take a pic and submit it this afternoon. My cx parts guy ( a finisher in the World Masters) swears by them. I'll test very soon.
so I took pictures...atpjunkie
Nov 18, 2003 8:30 PM
and forgot the cord to download to my computer. So anyhow the brake pads are called YEHSTAR Gigapower Ceramic, there's logo and name on them LGA (Landesgewerbeanstalt Bayern) my guess is German or Dutch. They are post type canti pads (Spooky, PAUL, Froglegg etc..) and guess what? THEY FREAKIN' WORK! put them on, no tweaking, no rim prep, just set them on and BINGO squeal free. Brakes actually have built in toe-in as well. Could not have been easier. I'll post a pic of the box ASAP. If you can't find them I can get you in touch with my guy.
but I do have this oneatpjunkie
Nov 18, 2003 9:08 PM
not related but a great shot of my city on fire. This is San Diego and those hills are where a bunch of great rides were located.
That's really chilling, especially since we went through it, tooThe Walrus
Nov 19, 2003 10:52 AM
There's something about a huge wildfire at night that's truly hellish, like a Hieronymous Bosch painting, much more frightening than seeing it during the day. Those dirty yellow-brown billows of smoke, lit from within by a pulsing glow, and the sudden flaring as the wind pushes the flames into fresh fuel. It always looks like there is absolutely no hope of stopping it (especially when it's a mile from my home...)