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greasedscotsman
Joined: 17 Nov 2008
Posts: 205
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 Posted Thu Nov 5, 2009 9:07 am |
I was checking out a friend's new bike last night and was quite interested in how the STI cable routing had been done. The cable from the right hand lever ran into the left hand cable stop on the down tube and vice versa with the left hand cable (does that make sense, sorry, I don't have any photos). The cables then crossed along the length of the down tube.
I've seen this done on mountain bikes before, think it makes an easier cable run when using Gripshift. But never seen it on a road bike.
At first I though the cables had been set up incorrectly, but actually this might be a good idea as the cables don't then rub on the head tube. Good idea or not?
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onbike 1939
Joined: 09 Dec 2004
Posts: 472
Location: United Kingdom
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Posted Thu Nov 5, 2009 10:48 am |
This is now becoming more common and is said to provide a better cable run.
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andy_wrx
Joined: 10 Jan 2006
Posts: 2091
Location: Cheshire - soft underbelly of the North
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Posted Thu Nov 5, 2009 2:08 pm |
A friend had new cables fitted to his bike and they came back like this, so obviously the shop mechanic thought it was a good idea.
It's very common on flat-bar bikes, as the shifters are closer to the centre than when out on drops, so to curve them to the 'same side' cablestop on the headtube would mean a too-tight bend.
The idea's the same on a roadbike - less bend in the cable means less friction and a sweeter gearchange, although in order to be able to turn the bars to full lock, the cables shouldn't be cut too short.
Mrs wrx has a Sirrus with this routing, but it also has a third set of bottle bosses on the underside of the downtube - exactly where the two cables cross...that's a well-thought-through idea then !
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Sigline added back for Nick :-
Because it comes from French, the event is called a 'sportive' (or cyclosportive);
- a 'sportif' is a competitor in one |
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John.T
Joined: 12 Nov 2004
Posts: 1748
Location: Harrogate. N. Yorkshire. UK
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crankycrank
Joined: 12 Jan 2009
Posts: 404
Location: San Diego, USA
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Posted Thu Nov 5, 2009 8:41 pm |
Depends on the bike. Some will do better with crossed and some are better straight. Just eyeball the cable angles at the stops. The fewer sharp bends the better. And just make sure the cable isn't rubbing against the frame.
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Monty Dog
Joined: 14 Dec 2006
Posts: 10429
Location: Fleet, UK
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Posted Fri Nov 6, 2009 8:01 am |
Been doing it that way for 10 years - I use a smaller frame with a shorter stem and it's the only way to get a half-decent cable run - and even better if you have the front brake on the left too - the way it was designed. The worst frames are those with cable stops on the headtube, which simply don't give you enough room unless your run Nokons or i-link cables which can handle the tighter radius better.
Make mine an Italian, with Campagnolo on the side.. |
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