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cable housing length for barcons(9 posts)

cable housing length for barconsAsh
Dec 7, 2003 6:27 PM
Hi all,

I just got some new 8spd shimano barcons. They came with cables and precut cable housing.

The housing seems kind of long out of the box. Should I size the housing length by making sure that the bars can fully rotate left and right? Or just use the housing as is.

I am used to cutting housing down as short as possible to cut down on friction, but I am new to bar cons

thanks
re: cable housing length for barconsdamon
Dec 8, 2003 9:23 AM
Cutting housing down as short as possible to reduce friction is a bit of a false ideal. Shorter housing typically means tighter bend radii, which means more friction. There really isn't any friction for a cable going in a straight line...

Smooth graceful bends like the ones necessary to allow full bar rotation make everything happy. There is, of course, a limit to how graceful you want a bend (cables sticking waaay out there in the wind). Additionally, i have seen people who's opinions i respect route barcon housing the entire length of the bar so it is out of the way and won't ever get snagged... i've never worried about it, though.

Anyway, just one riders opinion,
-Damon
re: cable housing length for barconsThe Walrus
Dec 8, 2003 11:59 AM
I just went and looked at the bikes I have set up with barcons; the loops of cable housing are all about even with the brake levers, with a slight lateral "bulge" that results in the left and right housings just barely overlapping. As the above poster said, too short a housing will cause binding because of the tight radius. Better to err on the side of looseness.
I like the aesthetics of cable under the tape...SenorPedro
Dec 8, 2003 1:40 PM
...but it is truly preference. I would probably never catch the cable on anything if it was out there. I notice no difference in "friction" between a fully wrapped cable set for barcons and a naked cable on a DT shifter.
How do you route the shifter cables?The Walrus
Dec 8, 2003 6:51 PM
Do you run them in tandem with the brake cables, or along the rear side of the bar? ...and what about the bulge running along the bottom half of the drops? That's what I'd have issues with. (A picture would help....)
How do you route the shifter cables?atpjunkie
Dec 9, 2003 8:37 PM
I don't run all the way up the bar. It looks cleaner but I just don't see how 3 tight bends (up drop, around hood and bend at bar tape end) can deliver the shifting performance and /or ease of maintenance as one swooping bend from the bottom. Here's a pic or 2.
from the frontatpjunkie
Dec 9, 2003 8:42 PM
still looks pretty clean IMHO
Aaaah--another traditionalist, or in your case, Luddite...The Walrus
Dec 10, 2003 12:50 PM
...that's the way I've always done 'em (just never thought there
i was
any other way). I agree about the binding issues, but that clean look still sounds pretty enticing. Some day, when I have absolutely nothing else to do....
Luddite Poweratpjunkie
Dec 11, 2003 8:57 PM
these bikes as is are far faster than I'll ever be. I just can't see the economic factor of STI's. I have an engineer/machinist friend I'm going to try to talk into a modify of an ergo to Shimano cable throw.
Clean look sounds good, may look good but look at a drop bar and envision all the twists and turns that cable has to make. Like many things that just don't make sense to me, being the amateur engineer that I am. Broke the drop out on the red Specialized. here's her replacement