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Too much gear housing?

Old 11-08-17, 07:44 PM
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El Gato27
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Too much gear housing?

Garage sale find, front dearaileur not shifting so I was going to replace the cable and housing and noticed the housing running all along the down tube, a little different than I'm used to seeing. Has anyone seen this type of setup before? Any issues with running that much housing?

Thank you.
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Old 11-08-17, 07:50 PM
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Does that downtime have an arc to it? I'm thinking the long cable housing is so it will lay close to the arc.

Fresh cable housings is always a good guess for fixing sluggish shifting.
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Old 11-08-17, 08:44 PM
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Originally Posted by Retro Grouch View Post
Does that downtime have an arc to it? I'm thinking the long cable housing is so it will lay close to the arc.

Fresh cable housings is always a good guess for fixing sluggish shifting.
May as well replace the inner wires while you are at it.
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Old 11-08-17, 09:12 PM
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long housings can trap moisture and rust the cables inside

I prefer frames with housing stops and short housing segments instead
if water does manage to get in, it's easy to clean and lube them
not so with full length housing.

that's the drawback
not like you get a choice about it though; the frame is what it is
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Old 11-08-17, 10:04 PM
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Originally Posted by xenologer View Post
long housings can trap moisture and rust the cables inside
+1 this. Particularly front derailleur housings with dependent loops like this one. Replace the cable and housing and inject some grease into the housing to block intrusion of moisture.
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Old 11-09-17, 10:12 AM
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cable housing running the full length will not be crud contaminated as easily as short sections with bare cable between stops..

for muddy MTB riding that may be a benefit. yes to greasing even if cable is stainless steel and housing is Teflon lined, (especially if it's not SS)





(2 fully housed cables a feature on my Rohloff shift cables, from grip shifter on handle bar to external shift box at the rear wheel)






....
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Old 11-09-17, 10:40 AM
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Looks like there isn't a stop higher up on the down tube, so your stuck with the long housing (unless you bet a clamp on stop)
Use stainless steel cable, and new lines housing and you should be fine.
Make sure the derailer and shifter move freely.
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Old 11-09-17, 01:00 PM
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El Gato27
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I hadn't thought about the arced down tube needing full housing, but it makes sense. The shifter works fine, the derailleur is a bit stiff, might need to replace it also. Will see after cable+housing replacement.

Thanks for the replies.
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Old 11-12-17, 01:38 AM
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Look at what they have done with the rear brake cable running along the top tube. I think similar is meant to happen on the down tube for the gear cables.
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Old 11-12-17, 08:04 AM
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The cable would be out in the air,, with a regular cable stop at both ends, like most bikes have. You can cut cable housings and brake, derailleur cables with a Dremell with a cut off wheel.
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Old 11-12-17, 11:34 AM
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Pull on the derailleur cable on the length closest to the derailleur. If the derailleur works fine, moving back and forth without any problems, then the stickiness is in the cable housing. If doesn't move and doesn't snap back immediately, then there's a problem with a derailleur. Most likely just needs cleaning and lubing.

But even if it's just the derailleur that needs cleaning and lubing, it's probably a good idea to change the cable and housing.
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