Housing UNDER the cable guide?
#27
Senior Member
Join Date: May 2008
Location: Fredericksburg, Va
Posts: 9,579
Bikes: '65 Frejus TDF, '73 Bottecchia Giro d'Italia, '83 Colnago Superissimo, '84 Trek 610, '84 Trek 760, '88 Pinarello Veneto, '88 De Rosa Pro, '89 Pinarello Montello, '94 Burley Duet, 97 Specialized RockHopper, 2010 Langster, Tern Link D8
Mentioned: 73 Post(s)
Tagged: 0 Thread(s)
Quoted: 1609 Post(s)
Liked 2,216 Times
in
1,103 Posts
Towing Shimano hybrids!
__________________
Bikes don't stand alone. They are two tired.
Bikes don't stand alone. They are two tired.
#28
Senior Member
I have a bike with braze-on cable guides and I'm running 11-speed so I want/need least possible cable friction. But I'm questioning the wisdom of using some cable liner at just these sections. Seems like a recipe for trapping water and grit? Whereas you can keep just applying grease as needed? My cable guides seem fairly smooth.
I was considering either the Nokon liner: Amazon.com : Jagwire L3 Liner Kit for Nokon Systems (2000mm) : Sports Outdoors : Sports & Outdoors
Or just housing liner: https://www.amazon.com/gp/product/B00...A2TE9IQP68MWQU
But without a way to seal the tube from accumulating crap, it seems like a bad idea?? FWIW, the Campagnolo cable ends actually have rubber seals. I have no idea how to create a robust rubber seal for a little piece of tubing around the cable guide area.
I was considering either the Nokon liner: Amazon.com : Jagwire L3 Liner Kit for Nokon Systems (2000mm) : Sports Outdoors : Sports & Outdoors
Or just housing liner: https://www.amazon.com/gp/product/B00...A2TE9IQP68MWQU
But without a way to seal the tube from accumulating crap, it seems like a bad idea?? FWIW, the Campagnolo cable ends actually have rubber seals. I have no idea how to create a robust rubber seal for a little piece of tubing around the cable guide area.
#29
Ride, Wrench, Swap, Race
Join Date: Jan 2010
Location: Northern California
Posts: 9,194
Bikes: Cheltenham-Pedersen racer, Boulder F/S Paris-Roubaix, Varsity racer, '52 Christophe, '62 Continental, '92 Merckx, '75 Limongi, '76 Presto, '72 Gitane SC, '71 Schwinn SS, etc.
Mentioned: 132 Post(s)
Tagged: 0 Thread(s)
Quoted: 1565 Post(s)
Liked 1,296 Times
in
866 Posts
If a tubing noodle is used under the bottom bracket, it should have a window cut into the bottom at the lowest point, to allow water to drain.
I've worked on a couple of frames with disturbing sharp steps that the cable dragged over, and found thick-walled poly tubing that fit tightly into the guide loop that the cable routes through, such that a minimal length of the tubing could be positioned so as to cross the sharp step feature just behind the loop.
For the standard guides as on the OP's frame, I would run it bare, but would experiment with lubricants while the powdercoat wears down, the thickness of which might be reducing the inside radius of the guide slot, creating a wedging/pinching action on the cable.
GripShift grease is the slipperiest (by far) lube that I've ever used for cables sliding against polymer surfaces.
I've worked on a couple of frames with disturbing sharp steps that the cable dragged over, and found thick-walled poly tubing that fit tightly into the guide loop that the cable routes through, such that a minimal length of the tubing could be positioned so as to cross the sharp step feature just behind the loop.
For the standard guides as on the OP's frame, I would run it bare, but would experiment with lubricants while the powdercoat wears down, the thickness of which might be reducing the inside radius of the guide slot, creating a wedging/pinching action on the cable.
GripShift grease is the slipperiest (by far) lube that I've ever used for cables sliding against polymer surfaces.
Last edited by dddd; 01-19-16 at 12:41 AM.
Thread
Thread Starter
Forum
Replies
Last Post
wernst
Bicycle Mechanics
4
07-05-13 12:45 AM