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PostPosted: Fri Jul 04, 2014 10:25 pm 
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Joined: Fri May 08, 2009 8:31 pm
Posts: 268
Location: Denver
I am building up a Colnago CLX3 for my son and am having problems with excessive friction in the internal rear brake cable routing. It seems to me that the source is the bare cable rubbing against the housing stop inside the top tube. The brakes are Campy Record, and I'm using the Campy ultralow friction cables and housing, with no end caps on the housing (I don't think they even make them for the brake housing). I have checked and rechecked the ends of the cable housing and I don't see any burrs or deformation of the housing. You can actually hear the rubbing sound when you actuate the brake lever (although I cannot localize it to one end of the top tube or the other). This is the first bike I have had with internal brake cables, and perhaps I'm missing something. Any ideas? This is driving me nuts!


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PostPosted: Sat Jul 05, 2014 6:11 am 
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Joined: Fri Dec 11, 2009 10:38 pm
Posts: 1535
Location: Welland, Ontario
I built up a CLX2 for a friend recently - same shape TT but external routing, and it's the first modern bike I've built that required a full length rear brake housing. With the entry/exit points coupled with the shape of the tube on the CLX3, I'd think it's rubbing on the tube. Does the CLX3 perhaps require full length housing too?

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PostPosted: Sat Jul 05, 2014 10:27 am 
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Joined: Mon Sep 01, 2008 5:07 pm
Posts: 72
Location: Zwaag Nederland
Try nosed end caps from jagwire for example. The rubbing is most of the time in the exit part of the frame and the innercable bents a little bit going into the outher cable and rubs. The nosed end cap bridges this part of the frame and problem solved.


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PostPosted: Sun Jul 06, 2014 11:16 pm 
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Joined: Fri May 08, 2009 8:31 pm
Posts: 268
Location: Denver
Thanks, Marcel- I was thinking that might be my only solution, too. I will try to find some of these at my LBS tomorrow. Bikerjulio, I am sure that the internal routing on this frame doesn't use a full length cable housing- there are internal cable stops that would prevent doing this.


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