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Old 10-04-09, 01:36 PM   #1
robtown
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MTB brake cable routing buides have V-brake not disc

I'm trying to put together [cheaply] a Performance brand MTB frame with top routing/guides. Two of the top guides have stops for the cables/ferrules but the rear brake guide does not. The frame and add-on fork are disc capable but I don't have disc capable wheels or disc brakes [just cheap V brakes.] The guide does seem to have a small set screw type socket.
Does anyone know of an adapter or method to either route the cable jacket the entire length (it fits the mount loosely) or stop the cable/ferrule and run the bare cable over the top tube?
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Old 10-04-09, 01:48 PM   #2
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You don't need a stop/ferrule, you can just run cable/housing full length all the way to the v-brake noodle. Either the top tube has brazeons for c-clips that keep the housing in place or you can use a zip-tie.
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Old 10-04-09, 02:15 PM   #3
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i agree with operator.
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Old 10-04-09, 02:35 PM   #4
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You don't need a stop/ferrule, you can just run cable/housing full length all the way to the v-brake noodle. Either the top tube has brazeons for c-clips that keep the housing in place or you can use a zip-tie.
This is what it has. I found c-clips at JensonUSA but I don't think they will fit. You can see the other two cables fit snug but the last grove won't hold cable or ferrule tight.

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Old 10-04-09, 02:41 PM   #5
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I guess I'd go with 5mm housing(1mm thicker than the shifter housing shown there) full length and wrap with electrical tape to increase diameter further if needed where housing passes through guides.
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Old 10-04-09, 04:08 PM   #6
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This is what it has. I found c-clips at JensonUSA but I don't think they will fit. You can see the other two cables fit snug but the last grove won't hold cable or ferrule tight.

Yes, that's not a c-clip type cable brazeon. I can't quite see it but if there isn't a stepdown (e.g to stop the ferrule from moving) then it was only designed to hold the housing in place - meaning it's full length cable housing the whole way.

You can ascertain this from visual inspection/other obvious stuff.
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Old 10-04-09, 04:58 PM   #7
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Yes, that's not a c-clip type cable brazeon. I can't quite see it but if there isn't a stepdown (e.g to stop the ferrule from moving) then it was only designed to hold the housing in place - meaning it's full length cable housing the whole way.

You can ascertain this from visual inspection/other obvious stuff.
So - that means the disc brake style cable would snap snugly into place without additional hardware? If so, I guess a little bit of electrical tape might do the trick with standard cable housing.
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Old 10-04-09, 07:53 PM   #8
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So - that means the disc brake style cable would snap snugly into place without additional hardware? If so, I guess a little bit of electrical tape might do the trick with standard cable housing.
I haven't worked with enough MTB/Disc brake equipped bikes to know if the outer diameter of compressionless housing is larger than the standard 5mm housing for brakes. Maybe someone else can chime in here.
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Old 10-04-09, 08:26 PM   #9
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So - that means the disc brake style cable would snap snugly into place without additional hardware? If so, I guess a little bit of electrical tape might do the trick with standard cable housing.
I'm a bit confused. Are you saying you want to put disc brake style cable on the bike? Or going with the V-brakes? If a standard brake cable housing will fit through the guide, then I would just run cable and housing continuous from lever to brake. Assuming you're wanting V-brakes. If it pops out a black zip tie will hold it in there and not be very noticable.
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Old 10-04-09, 11:59 PM   #10
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I bought a cheap Sette frame from pricepoint.com to build up a bike for my brother. His was set up for disc rear as well (has canti bosses though) and I had to run full length brake housing. The Sette frame did have better mounts, I used zip ties to snug up the cable...

Looks like electrical tape shim might be your best bet here!
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Old 10-05-09, 07:15 AM   #11
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Quote:
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I haven't worked with enough MTB/Disc brake equipped bikes to know if the outer diameter of compressionless housing is larger than the standard 5mm housing for brakes. Maybe someone else can chime in here.
It's the same outer diameter (5mm), at least the Jagwire stuff I have is.

This stuff: https://www.speedgoat.com/product.as...t=27&brand=124

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Old 10-05-09, 07:21 AM   #12
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It's the same outer diameter (5mm), at least the Jagwire stuff I have is.
Yup. Brake cable for mechanical discs is the same as for V's and Canti's.

On the conversions I've done from V to disc, I just change the way the rear is run and eliminate the V noodle and run the jacket all the way down the left seatstay and ziptie it to the stay.. Optionally you could just run full jacket from lever to brake.
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Old 10-05-09, 07:28 AM   #13
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Yup. Brake cable for mechanical discs is the same as for V's and Canti's.
The stuff I linked to isn't standard coiled brake cable housing. It's "compressionless" brake cable housing which uses a Kevlar wrapping to reinforce the housing.
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Old 10-05-09, 08:12 AM   #14
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Originally Posted by operator View Post
Yes, that's not a c-clip type cable brazeon. I can't quite see it but if there isn't a stepdown (e.g to stop the ferrule from moving) then it was only designed to hold the housing in place - meaning it's full length cable housing the whole way.

You can ascertain this from visual inspection/other obvious stuff.
What you need is a cable guide stopper like this



Jagwire's catalog number is CHA056. It fills the hole so that you can mount cable in it.



You can just see the end of the adapter in the upper brake cable guide in this picture. It's almost out of the picture in the upper left corner.
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Old 10-05-09, 08:18 AM   #15
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electrical shrink tubeing could be used as shims and would look neater than tape.
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Old 10-05-09, 07:36 PM   #16
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That looks like the best solution. Builds always end up costing more but spending a few extra bucks sometimes makes the end result a lot nicer. Thanks!

Quote:
Originally Posted by cyccommute View Post
What you need is a cable guide stopper like this



Jagwire's catalog number is CHA056. It fills the hole so that you can mount cable in it.



You can just see the end of the adapter in the upper brake cable guide in this picture. It's almost out of the picture in the upper left corner.
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Old 10-05-09, 09:59 PM   #17
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That looks like the best solution. Builds always end up costing more but spending a few extra bucks sometimes makes the end result a lot nicer. Thanks!
If you google Jagwire CHA056, you can find all kinds of them. Unfortunately, you end up with 10 of them for $9 and you'll only need 2 (front and rear). Your local bike shop may be the best bet.
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Old 10-06-09, 06:50 PM   #18
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If you google Jagwire CHA056, you can find all kinds of them. Unfortunately, you end up with 10 of them for $9 and you'll only need 2 (front and rear). Your local bike shop may be the best bet.
I did order some for $12 shipped then canceled it because the LBS had a couple for $2. I checked the frame tonight and these will do the job. Thanks again.
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