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Noisy shimano disk brakes AGAIN !
NB: Originally posted elsewhere on the Global Riders Network and appears via syndication.
hi all
my shimano disk brakes are squeeeling again.rode yesterday they were fine and have been for weeks .i have replaced pads and every time they are fine then if bike not riden within 1 week the breaks seem to start screeming again.
before i reach the end of my tether and replace the system has anyone got any ideas
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Try not washing your bike for a few weeks. See if it goes away then.
Exactly what model of brake and bike is it and from what year?
In general, do the easy things first:
- Get disc brake cleaner from super cheap auto and clean the rotor (preferably after detaching from the wheel). Just follow the instructions on the can.
- switch pads from front brake to back brake
- Reallign brake by loosening the screws holding it to the frame, jiggle it around a bit to ensure the brake is free to move, then engage the brake and tighten the bolts while doing so.
Otherwise:
- Try new pads
- Install new rotor (in case the old one is kinked)
they are shimano 445 about 8 months old.
have tried brake cleaner and rotating pads and re aline the calipers .it goes away for a week or to then comes back.have even changed rotors with new but still it happens.
starting to think it the brake set itself(they came with the bike) b/s changes the pads then starts again after 1 or 2 rides.
it happens on front and rear but at different times .front does it when i start the ride then the rear tend to start once they are hot .
have tried to get different pad material but only resin pads available.
Then you'll know what squealy brakes sound like!
What pads are you using? Organic or metallic? You could try scuffing the brake track on your discs with 4-600 grade wet and dry.
I have the stock shimano i think they are resin.iv looked for other types but havent found anything other than resin.
have thought about upgrade but unsure what option.have been told the xt brakes are great.
My commuter (Scott Sub 10) runs Shimano M486 which are an entryish level hydro brakes with Resin pads and disks marked as resin only. When the front pads wore out I got 2 sets of cheapo sintered pads on ebay for $20 and they are amazing. The stopping power increase is brilliant, basically as good as the XTs on my hardtail. If you can find some go for it, noise but then I never had any to start with
I've got 2010 XT brakes on my Rize and I have to warn people about them - compared to Avids they provide so much more stopping power you can easily send yourself over the front if you're not expecting it. That's with 160mm rotors and stock XTR metallic pads, which I prefer for wear reasons - resins go away real fast in the wet.
Only noisy if they've had some water on them. The racket goes away once they've dried out.
You only answered part of my question brother....
What model of brake? (Shim 445) sweet got that....
Again ... what bike (brand) and what year model of bike? 8 months old I could guess a 2011? but I'd be guessing...
I'll wait for you...
OK, I see they're the entry-level Alivio level brake hydraulic system. Not that they aren't any good, they certainly work, but an upgrade to SLX or XT would be a significant improvement. I don't think you can get metallic pads for the 445's, but I've used Discobrake pads that are compatible on my son's first dually and their performance was quite OK, and noise free.
sorry but i should have been more descriptive so here we go.
2011 montari 3 (not the new frame.
the brakes say 445 on them with no brand level name .
money starting to get low so an economic upgrade would be good .slx seem to be on sale around the place.also seen tecktro pro hydrolic set on torpeodo 7 for $129.00 just not sure on quality.
Go with SLX over the tektros. Better quality.
the other option was a base level of hayes but they look just the same as tektro so looks like rebadging.the other choose in the price range are the avid but from what i read they are a pain to fit and maintain
Sweet.... that's better.
Ok assuming the bike is/was a new purchase? Take it back to your dealer.
From time to time some of Shimano's basic hydraulic brakes have suffered from oil leaking through the caliper halves and eventually onto the pads/rotor. This effect is often accelerated by the fact that oil migrates more when hot and it is a bit thinner as a result. Some batches of these brakes had an undersize O'ring between the caliper halves which allowed the oil to escape. So if you are the original purchaser it might, I say might entitle you to a warranty replacement.
It explains what is repeatedly happening...
Hope that helps...