Go Back  Bike Forums > Bike Forums > Bicycle Mechanics
Reload this Page >

No cable guide under BB

Notices
Bicycle Mechanics Broken bottom bracket? Tacoed wheel? If you're having problems with your bicycle, or just need help fixing a flat, drop in here for the latest on bicycle mechanics & bicycle maintenance.

No cable guide under BB

Old 03-03-20, 03:22 PM
  #1  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
No cable guide under BB


​​​​​​
A quick question for the mechanics here. This is the photo of the compartment below the bottom bracket. Am I missing the cable guide? Or the cables are supposed to go naked directly on the frame ?

I am worried the cables will saw through the frame. There is no bolt to attach a cable guide. The silver “nut” is for the bolt that holds the compartment cover.
rami_arna is offline  
Old 03-03-20, 03:26 PM
  #2  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 24,390
Mentioned: 192 Post(s)
Tagged: 0 Thread(s)
Quoted: 11263 Post(s)
Liked 829 Times in 654 Posts
I'm wondering if the frame is designed to have full length cable housing.
CliffordK is offline  
Old 03-03-20, 03:28 PM
  #3  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
Not sure to be honest. It’s a no name Chinese frame who I promised I would build for a friend but I was expecting a cable guide.
rami_arna is offline  
Old 03-03-20, 03:28 PM
  #4  
tyrion
Senior Member
 
tyrion's Avatar
 
Join Date: Oct 2015
Location: San Diego, California
Posts: 2,838

Bikes: Breezer Radar

Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1524 Post(s)
Liked 550 Times in 279 Posts
Maybe the cables go inside the frame. Are there holes in the frame by the head tube to route the cables into?
tyrion is offline  
Old 03-03-20, 03:29 PM
  #5  
MugenSi
Junior Member
 
Join Date: Jan 2019
Posts: 17
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 4 Post(s)
Likes: 0
Liked 10 Times in 4 Posts
Is it a brand new frameset? Is it possible that its a Di2/EPS only frame? If you contact the manufacturer I'm sure there is probably a cable guide that bolts onto that cover.

Does the cover come out? Is that single hole at the back where the RD Di2 cable goes into?
MugenSi is offline  
Old 03-03-20, 03:30 PM
  #6  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
Yes it is an internal route frame. This is actually inside the frame. There is a small “door” that opens to this and when I place the cables Into the frame they get routed into this compartment.
rami_arna is offline  
Old 03-03-20, 03:32 PM
  #7  
tyrion
Senior Member
 
tyrion's Avatar
 
Join Date: Oct 2015
Location: San Diego, California
Posts: 2,838

Bikes: Breezer Radar

Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1524 Post(s)
Liked 550 Times in 279 Posts
Originally Posted by rami_arna View Post
Yes it is an internal route frame. This is actually inside the frame. There is a small “door” that opens to this and when I place the cables Into the frame they get routed into this compartment.
Looks like you need full length cable housing.
tyrion is offline  
Old 03-03-20, 03:33 PM
  #8  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
Originally Posted by MugenSi View Post
Is it a brand new frameset? Is it possible that its a Di2/EPS only frame? If you contact the manufacturer I'm sure there is probably a cable guide that bolts onto that cover.

Does the cover come out? Is that single hole at the back where the RD Di2 cable goes into?
It is a new frame and it is di2 ready. But it has both holes for di2 and cables. There are two holes near the FD one for a di2 and another smaller one for a normal cable.
rami_arna is offline  
Old 03-03-20, 03:36 PM
  #9  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
Originally Posted by tyrion View Post
Looks like you need full length cable housing.
Seems like the most plausible solution. I think I might do with this one. I never knew some bikes were made to take full housings internally.
rami_arna is offline  
Old 03-03-20, 03:37 PM
  #10  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
How about using inner sleeves to reduce the friction just for the section below the bb.
rami_arna is offline  
Old 03-03-20, 04:42 PM
  #11  
tyrion
Senior Member
 
tyrion's Avatar
 
Join Date: Oct 2015
Location: San Diego, California
Posts: 2,838

Bikes: Breezer Radar

Mentioned: 23 Post(s)
Tagged: 0 Thread(s)
Quoted: 1524 Post(s)
Liked 550 Times in 279 Posts
Originally Posted by rami_arna View Post
How about using inner sleeves to reduce the friction just for the section below the bb.
Any cable that is not in housing must be bracketed by 2 solidly attached stops to maintain tension.
tyrion is offline  
Old 03-03-20, 04:43 PM
  #12  
dsbrantjr
Senior Member
 
dsbrantjr's Avatar
 
Join Date: Sep 2010
Location: Roswell, GA
Posts: 7,244

Bikes: '93 Trek 750, '92 Schwinn Crisscross, '93 Mongoose Alta

Mentioned: 22 Post(s)
Tagged: 0 Thread(s)
Quoted: 1047 Post(s)
Liked 405 Times in 303 Posts
Originally Posted by rami_arna View Post
​​​​​​
I am worried the cables will saw through the frame. There is no bolt to attach a cable guide. The silver “nut” is for the bolt that holds the compartment cover.
If you want to install a cable guide you could use a longer bolt and pass it through both the guide and cover.
dsbrantjr is online now  
Old 03-03-20, 04:45 PM
  #13  
CliffordK
Senior Member
 
CliffordK's Avatar
 
Join Date: Nov 2014
Location: Eugene, Oregon, USA
Posts: 24,390
Mentioned: 192 Post(s)
Tagged: 0 Thread(s)
Quoted: 11263 Post(s)
Liked 829 Times in 654 Posts
If you get "shift" cable housing, it has longitudinal wires, and a liner to help reduce both friction and compression.

It is also slightly smaller in size than brake cable housing.

If I was you, I'd start with a piece of cable housing and shove it into the holes to verify whether you have cable stops, or if it just keeps going (full length cable). Or, perhaps cable stops in unexpected locations.
CliffordK is offline  
Old 03-03-20, 05:18 PM
  #14  
DaveSSS
Senior Member
 
Join Date: Sep 2008
Location: Loveland, CO
Posts: 5,797

Bikes: TWO Colnago C-RS w/Chorus 12

Mentioned: 1 Post(s)
Tagged: 0 Thread(s)
Quoted: 397 Post(s)
Liked 140 Times in 110 Posts
The cover plate that you removed has no grooves in it? Usually there are grooves to keep the cables in the correct position. My Colnago has a removable door, but it has grooves in it, for cable liner housing liner (not housing). This keeps the dirt off the cable. That's the only area where the cables are exposed.
DaveSSS is offline  
Old 03-04-20, 06:09 AM
  #15  
rami_arna
Junior Member
Thread Starter
 
Join Date: Feb 2020
Posts: 23
Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 6 Post(s)
Liked 7 Times in 5 Posts
Originally Posted by DaveSSS View Post
The cover plate that you removed has no grooves in it? Usually there are grooves to keep the cables in the correct position. My Colnago has a removable door, but it has grooves in it, for cable liner housing liner (not housing). This keeps the dirt off the cable. That's the only area where the cables are exposed.
Nope. No grooves at all. I guess it’s best to run it with housing inside the frame. At least roll it passes the bottom bracket area.
rami_arna is offline  
Old 03-07-20, 08:56 AM
  #16  
bitpuddle
Member
 
Join Date: Jan 2015
Location: Brooklyn, NY
Posts: 43

Bikes: Cinelli Nemo Tig / Battaglin Power Plus / Giant TCR SL

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked 9 Times in 7 Posts
What is under that cover? It wouldn’t be usual to have guides on the back of that cover. Full-length housing would be a little unusual.

Also, what is going on with the paint on the bottom bracket at the upper-left of the photo? Is there damage, or is it just an odd reflection?
bitpuddle is offline  
Old 03-07-20, 01:53 PM
  #17  
WizardOfBoz
Generally bewildered
 
WizardOfBoz's Avatar
 
Join Date: Aug 2015
Location: Eastern PA, USA
Posts: 2,691

Bikes: 2014 Trek Domane 6.9, 1999 LeMond Zurich, 1978 Schwinn Superior

Mentioned: 20 Post(s)
Tagged: 0 Thread(s)
Quoted: 993 Post(s)
Liked 212 Times in 155 Posts
I see a big hole in the front for cable housings. Are there small holes in the back for the cables themselves? Like this:?
WizardOfBoz is offline  
Old 03-07-20, 07:47 PM
  #18  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 13,428

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2374 Post(s)
Liked 436 Times in 343 Posts
Originally Posted by bitpuddle View Post
What is under that cover? It wouldn’t be usual to have guides on the back of that cover. Full-length housing would be a little unusual.

Also, what is going on with the paint on the bottom bracket at the upper-left of the photo? Is there damage, or is it just an odd reflection?
What I find interesting is the marked out number (serial number?) sticker. This could turn out to be a buyer beware bike. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 03-07-20, 07:57 PM
  #19  
bitpuddle
Member
 
Join Date: Jan 2015
Location: Brooklyn, NY
Posts: 43

Bikes: Cinelli Nemo Tig / Battaglin Power Plus / Giant TCR SL

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 14 Post(s)
Liked 9 Times in 7 Posts
Originally Posted by Andrew R Stewart View Post
What I find interesting is the marked out number (serial number?) sticker. This could turn out to be a buyer beware bike. Andy
I assumed the OP crossed it out, but, yes, if it came that way, it is weird.

Looking at that cover, the simple explanation is that they forgot to include the cable guide, but who knows. Any cable guide would work.
bitpuddle is offline  
Old 03-07-20, 08:06 PM
  #20  
Andrew R Stewart 
Senior Member
 
Andrew R Stewart's Avatar
 
Join Date: Feb 2012
Location: Rochester, NY
Posts: 13,428

Bikes: Stewart S&S coupled sport tourer, Stewart Sunday light, Stewart Commuting, Stewart Touring, Co Motion Tandem, Stewart 3-Spd, Stewart Track, Fuji Finest, Raleigh Pro, Trek Cycle Cross, Mongoose tomac ATB, GT Bravado ATB, JCP Folder

Mentioned: 0 Post(s)
Tagged: 0 Thread(s)
Quoted: 2374 Post(s)
Liked 436 Times in 343 Posts
Originally Posted by bitpuddle View Post
I assumed the OP crossed it out, but, yes, if it came that way, it is weird.

Looking at that cover, the simple explanation is that they forgot to include the cable guide, but who knows. Any cable guide would work.
I seriously doubt this. Or every bike having both carbon molded construction and internal routing aspects, that I have worked on, had their specific guide. Andy
__________________
AndrewRStewart
Andrew R Stewart is offline  
Old 03-08-20, 09:05 AM
  #21  
rosefarts
Senior Member
 
Join Date: May 2015
Posts: 1,149
Mentioned: 4 Post(s)
Tagged: 0 Thread(s)
Quoted: 436 Post(s)
Liked 191 Times in 104 Posts
I'm personally interested in these open mold bikes so I'm interested.

My immediate thought is the intent is to use a short piece of housing just under the bottom bracket. There would be cable stops that would allow this or not that should be obvious.

It could also be that the cable won't rest on the frame at all, like a mm or two away. You'd need to be concerned about the material reinforcing the holes but that could work.

I personally wouldn't be opposed to building a little barrier for the frame out of a soup can.

If it really is designed for full length housing, that's crappy. I've never gotten a bike with that to shift well.

Maybe find some used Di2?
rosefarts is offline  
Old 03-08-20, 09:24 AM
  #22  
rm -rf
don't try this at home.
 
rm -rf's Avatar
 
Join Date: Jan 2006
Location: N. KY
Posts: 5,185
Mentioned: 10 Post(s)
Tagged: 0 Thread(s)
Quoted: 672 Post(s)
Liked 55 Times in 44 Posts
The marker over the serial appears to be a photoshop edit, to avoid posting the SN.

I assume the brake cable is internal on the top tube? And the rear derailleur runs through the top tube? Three holes with stops for housing at the head tube end of the bike? Or designed for disk brakes, allowing hydraulic housing?
This frame has one hole for cables at the bottom bracket. Otherwise, it's the same method as the 2-cable frame. Not full housing inside the frame.

I assume there's a cable housing socket at the head end of the frame? To use full length housing, it would need a single housing run from the shifter, through the down tube, then terminated at the socket in the image (if the housing actually fits into the socket and can make the bend down there -- test it first. A housing stop at the head end of the frame would have to be drilled out or removed if it's a fitting, not molded in.



one socket. There's a slot for a cable guide's wire. If there's a housing stop at the head end of the frame, it really needs a guide.


Last edited by rm -rf; 03-08-20 at 09:37 AM.
rm -rf is offline  

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off


Thread Tools
Search this Thread

Contact Us - Archive - Advertising - Cookie Policy - Privacy Statement - Terms of Service - Do Not Sell My Personal Information

Copyright © 2018 MH Sub I, LLC dba Internet Brands. All rights reserved. Use of this site indicates your consent to the Terms of Use.