massive fork judder...
 

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[Closed] massive fork judder under braking?

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Hi all

I've recently bought an alloy s-works tricross with Easton EC90X forks ... the trouble is when I'm braking at any decent speed I get this massive fork judder. It's got the original Avid canti brakes and theyre seated properly ... can anyone tell me whats going on??


 
Posted : 11/06/2015 7:33 am
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Fitting one of these can help a lot - the cause is fork flex changing the effective length of the cable and repeatedly tightening and releasing the brake.

[img] [/img]


 
Posted : 11/06/2015 7:42 am
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Ahh .... I see

It has one of those ... inverted and coming down from just under the stem.

So if I was to get rid of that one and fit a fork mounted one lower down would that sort it?

Also ... would normal brakes rather than canti's work ... bit reluctant to do that though cos I like the old canti's


 
Posted : 11/06/2015 7:49 am
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Yup, you need a fork mounted hanger to sort it.

Known issue with stem mounted hangers.

Here's the tech on it all:

http://velonews.competitor.com/2010/09/news/cyclocross/technical-qa-with-lennard-zinn-return-to-cross_101807


 
Posted : 11/06/2015 7:55 am
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mini-v's are a popular choice, again they change the way the cable runs so less chance of judder.

Be aware that badly aligned pads, dirty/sticky rims etc can have the same symptoms though.


 
Posted : 11/06/2015 7:56 am
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mini v's may be the only option ...
just looked at my fork and it's not drilled to take a fork mounted hanger

🙁


 
Posted : 11/06/2015 8:57 am
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check headset - it may need tightening up by the sound of it


 
Posted : 11/06/2015 9:00 am
 DezB
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I switched to mini-vs cos of this on my Cannondale. They're ok, a bit spongy though.

The best fix is... dare I say it... discs 😉


 
Posted : 11/06/2015 9:00 am
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pawsy_bear ... yep, checked that and its good'n'tight ...

DezB ...... noooooooooooooooo ... that means I would have to ditch the EC90X's and all their carbon loveliness 😥 .... can't do that .... they look so nice!


 
Posted : 11/06/2015 9:38 am
 DezB
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You know the answer...

[img] [/img]

😀


 
Posted : 11/06/2015 9:59 am
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... hhmmm

actually ... their nice too!

can't though the sworks is a 2007 one ... no disc mounts


 
Posted : 11/06/2015 10:40 am
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Just do the front as a disk...


 
Posted : 11/06/2015 11:21 am
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The older Tricrosses (pre-2011) were notorious for brake judder, especially the ones with carbon forks. They actually recalled some forks because of it. All the 2011+ models either came with that little fork mounted bit wwaswas posted or had a steel fork.


 
Posted : 11/06/2015 1:49 pm
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Thanks everyone for the help & advice.

Sorted it now ... managed to get a set of TRP V brakes ... not quite the retro look of the canti's but infinitely better brakes and no fork judder from the EC90's at all ... amazing!


 
Posted : 18/06/2015 7:37 am

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