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Topic: Screeching noise at front brakes

Posted on: 9th Aug 2014 10:23 AM    Quote and Reply

Hi all, after much research on branded bikes, i decided to just go for an aleoca bike from Giant since i won't have much time to ride in the next few months.
The Aleoca uncle from Giant adjusted the whole bike for me and when i eventually brought it home, i found out the front brake is screeching badly.
Understand that sandpaper and simple adjustment on the brakepad might help after watching some youtube videos.
You guys think i should adjust it or just ride a few more times and see if the brakes will settle in???
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Posted on: 9th Aug 2014 11:30 AM    Quote and Reply


Are they disc brakes?
Screeching is usually mis alignment of the pads / callipers or contamination of the pads - saw some idiot squirting wd40 all over his expensive SLX hydro brakes and drivetrain the other day at Ubin ...... - they squealed like hell after that.
Bedding in of the pads is done to deposit a thin film of pad material on the rotor so you get full power. But ride it around for 50Km or so and see if it gets any better
Some of the cheap mechanical disc brakes are not very adjustable you can try loosening the calliper and try to align it and tightening it - if you are unsure you can take to a shop should only be $5 or $10

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Posted on: 9th Aug 2014 11:56 AM    Quote and Reply


No it's not disc brakes but the conventional v-brakes. I will try adjust it as per what I saw on Youtube. 

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Posted on: 9th Aug 2014 12:02 PM    Quote and Reply


Easy then, just make sure that both brake arms are moving, centralise the pads by adjusting the spring screw and make sure the pads have a slight toe in so the front of the pad touches the rim first

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Posted on: 9th Aug 2014 1:33 PM    Quote and Reply


try cleaning ur rim that may has some sand or dirt, some times the brake pad mayb too clean contact with clean rim...but anyway sound will have unless u wan to use a disc brake that will reduce the sound...

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Posted on: 9th Aug 2014 2:34 PM    Quote and Reply


Suggestions:
1) Keep your rims clean meaning no oily smudges or things embedded in the rims
2) Check your pads for debris i.e. keep them clean
3) Adjust toe-in. You can use name cards. Search youtube/google for how to.

Lastly, maybe the brake pads are new, need a few rides to bed in.


Have a safe & enjoyable ride!

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Posted on: 9th Aug 2014 2:55 PM    Quote and Reply


Disc brakes are generally much worse for squeeling than rim brakes, the forces generated at the pads are many magnitudes higher than rim brakes.

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Posted on: 9th Aug 2014 6:22 PM    Quote and Reply


Disc brakes pad have Resin compound and slintered copper just for info


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Posted on: 10th Aug 2014 2:28 AM    Quote and Reply


 using WD40 on chains and bike parts are the worst. they are usually used to remove rust, but needs to be scrubbed away as they will wash away the "protective" layer of the metal parts.

disc brake mostly used for trail and off road bikes & v-brakes mostly for road and foldies. but i disliked v-brakes as they will tend to "scratch" the rims of the wheel (ie: dahon curve series) have to do weekly maintenace of the rims by cleanning them

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