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[Closed] Formula Rx brake 'judder'

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[#4367658]

Hi, got Rx brakes on my zaskar with Rx rotors and the original pads. They generally work fine but it's the noise, feelin under heavy braking. It's almost like abs, and a definite judder.

Anyone got any ideas?

Cheers

Ash


 
Posted : 16/09/2012 4:16 pm
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hit it with a hammer and buy hopes


 
Posted : 16/09/2012 4:16 pm
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Cheers tony, good advice. Need to buy a hammer!


 
Posted : 16/09/2012 4:30 pm
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Is this new or did it always happen? Original Formula rotors or someone else's?

Juddering can indicate contamination but you'd usually have other symptoms too.


 
Posted : 16/09/2012 4:34 pm
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It's happened from day one, thought it might be a bedding in issue. But it's not. They are new rotors! They came on the bike!


 
Posted : 16/09/2012 4:40 pm
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Hmm. Quick google suggests the Zaskar ships with the lightweight Formula rotors (lots and lots of round holes). Which if so, do wear a bit fast but aren't usually juddery. Crap spec choice frankly but shouldn't be the problem here.

I'd give everything a good clean and eyeball check, see if there's any uneven wear etc, probably scrub the pads back with a scotchbrite pad and refit, see what happens- good for diagnosis if nothing else. Check alignment and bolt tightness obviously. Basically standard misbehaving brake process.


 
Posted : 16/09/2012 4:44 pm
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hammer and hopes!


 
Posted : 16/09/2012 4:46 pm
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I have had this in the past with Avid brakes, did you bed the pads "and rotors" in when you first rode the bike?


 
Posted : 16/09/2012 4:49 pm
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Cheers north, will get on that. All bedded in so shouldn't be an issue there.


 
Posted : 16/09/2012 5:05 pm
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Check that the pads don't overhang the braking surface, and catch on the spokes of the rotor. I had this with Hope Mono minis, a change to a Shimano rotor with a deeper braking surface(and round profile)sorted it.


 
Posted : 16/09/2012 9:45 pm
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Turns out coaster was right. My pads are overlapping the main rotor surface and slightly catching on the arms. So without buying new discs how do I rectify this? Cheers

Ash


 
Posted : 20/09/2012 5:21 pm