TriаlsRider Posted November 30, 2013 Report Share Posted November 30, 2013 WTF is that and why? Brand new brakes. Quote Link to comment Share on other sites More sharing options...
nicolasp1405 Posted November 30, 2013 Report Share Posted November 30, 2013 Probably contaminate? Quote Link to comment Share on other sites More sharing options...
TriаlsRider Posted November 30, 2013 Author Report Share Posted November 30, 2013 Can't be, I have had only 6-7 rides and rotors and calipers are absolutely clean. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 30, 2013 Report Share Posted November 30, 2013 not bedded in properly and the pads went glassy. sand the pads until theyre matte texture,re-bed them in should have a shiny surface now Quote Link to comment Share on other sites More sharing options...
TriаlsRider Posted November 30, 2013 Author Report Share Posted November 30, 2013 What do you mean by saying not bedded in properly and how it is - to bed brakes in properly? Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 30, 2013 Report Share Posted November 30, 2013 (edited) when pads are new,ride down a hill while braking in intervals,like 2 seconds pulling the brake,5 seconds cooling. do this like 30 times,then go down the hill full speed and keep pulling the brake with increasing hand force until you are nearly stopping. repeat the last step if necessary,but remind yourself of letting the brake cool down in between if pads arent bedded in they dont touch the rotor with the full surface,like there are tiny mountains on them.you have to "grind" down those imperfections to get the full braking surface Edited November 30, 2013 by FamilyBiker Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted November 30, 2013 Report Share Posted November 30, 2013 Pads are glazed, rub them against some sandpaper and then bed in again dry. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted November 30, 2013 Report Share Posted November 30, 2013 ah,okay you call that glazed. Quote Link to comment Share on other sites More sharing options...
psiron Posted December 2, 2013 Report Share Posted December 2, 2013 I get that noise on my hopes and i also had it on my elixirs. I keep my bike in the garage and the damp gets to the brakes and they squeeel. it also happens on my mtb which has avid XO's which have recently been serviced and new pads bedded in by the local bike shop etc . If I do some practice in the garage on pallets, I take the bike out and warm up the brakes, like you would if you were bedding in new pads. And when its really damp, frustratingly, after the brakes are warmed I get started in the garage and the noise is back. :bow: So i crank up the volume on my mp3 and booogie. :wink2:. Quote Link to comment Share on other sites More sharing options...
ogre Posted December 3, 2013 Report Share Posted December 3, 2013 Quote Link to comment Share on other sites More sharing options...
AdamR28 Posted December 3, 2013 Report Share Posted December 3, 2013 I get that noise on my hopes and i also had it on my elixirs. I keep my bike in the garage and the damp gets to the brakes and they squeeel. it also happens on my mtb which has avid XO's which have recently been serviced and new pads bedded in by the local bike shop etc . If I do some practice in the garage on pallets, I take the bike out and warm up the brakes, like you would if you were bedding in new pads. And when its really damp, frustratingly, after the brakes are warmed I get started in the garage and the noise is back. :bow: So i crank up the volume on my mp3 and booogie. :wink2:. That's contamination. New pads and rotors is the only 100% cure. Quote Link to comment Share on other sites More sharing options...
psiron Posted December 3, 2013 Report Share Posted December 3, 2013 That's contamination. New pads and rotors is the only 100% cure. Fair point. Be nice to know what they're contaminated with. Quote Link to comment Share on other sites More sharing options...
bing Posted December 3, 2013 Report Share Posted December 3, 2013 If its anything oil based, there will be dark spots on the pads after you have sanded them. You won't be able to see it on the disk surface as it'll be ingrained in to it. As Adam says, new disk and pads is the only 100% effective solution Quote Link to comment Share on other sites More sharing options...
niconj Posted December 3, 2013 Report Share Posted December 3, 2013 That's contamination. New pads and rotors is the only 100% cure. I disagree. I had new BB7s and they did the same the first time I rode them. Then I removed the pads and saw that they were very dirty. But still, even after cleaning them they made horrible noise and from what I can tell, BB7s are never quiet using the stock pads. I recommend Avid organic pads that come with the BB7 RSL. They are cheap, quiet even in wet conditions and they break very well.If its anything oil based, there will be dark spots on the pads after you have sanded them. You won't be able to see it on the disk surface as it'll be ingrained in to it. As Adam says, new disk and pads is the only 100% effective solution Why would you have to buy new rotors when the pads are contaminated? You can clean the rotors with Acetone e voila. Quote Link to comment Share on other sites More sharing options...
psiron Posted December 3, 2013 Report Share Posted December 3, 2013 I don't want to get into a discussion about changing disks and pads etc. However I'm not convinced that my pads and rotors are contaminated, i won't bore you with why i think that, however, this evening i did a little experiment.Firstly I bled the front brake to see if i could contaminate it, secondly I did a 45 min session in the street outside my house and guess what, no squeaking! Thirdly, within ten mins on the pallets inside the garage, you guessed it back to squeaks city. Quote Link to comment Share on other sites More sharing options...
A.Baxter Posted December 3, 2013 Report Share Posted December 3, 2013 Is it do with the fact when your inside riding it gets a bit humid so moisture builds up on the pads/rotor and that's why it makes a sound? Similar to the noise discs make when there is water on them? I'm no expert on disc brakes as I never use them but could play a factor possibly ? Adam. Quote Link to comment Share on other sites More sharing options...
FamilyBiker Posted December 3, 2013 Report Share Posted December 3, 2013 most disc brakes brake even better if theyre wet. unless theyre contaminated. but yeah,sometimes cleaning the rotor doesnt help for some weird reason,sanding it helps though Quote Link to comment Share on other sites More sharing options...
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