| |
Main
Date: 07 May 2007 14:53:21
From: still me
Subject: Brake housing for Shift cables?
|
I know the other way around is a no-no, but is it OK to use brake
housing for shift cables (assuming physical cable end fit is OK) ?
|
|
| |
Date: 07 May 2007 21:15:43
From: A Muzi
Subject: Re: Brake housing for Shift cables?
|
still me wrote:
> I know the other way around is a no-no, but is it OK to use brake
> housing for shift cables (assuming physical cable end fit is OK) ?
It'll work , as it did for years before the new style, but without the
precision needed for crisp index shifting.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
|
| | |
Date: 08 May 2007 14:23:40
From: still me
Subject: Re: Brake housing for Shift cables?
|
On Mon, 07 May 2007 21:15:43 -0500, A Muzi <am@yellowjersey.org >
wrote:
>It'll work , as it did for years before the new style, but without the
>precision needed for crisp index shifting.
>--
I probably should have mentioned that I am a friction guy. Will "shift
cable housing" help out friction shifting precision also?
|
| | | |
Date: 08 May 2007 23:24:40
From:
Subject: Re: Brake housing for Shift cables?
|
Someone writes:
>> It'll work , as it did for years before the new style, but without
>> the precision needed for crisp index shifting.
> I probably should have mentioned that I am a friction guy. Will
> "shift cable housing" help out friction shifting precision also?
STI shift cable housing is specifically designed to be constant length
even when bending in a curve by having its steel strands in a helix,
similar to brake and shift cables. The reason for this is that shift
levers ON the bars requires the shift cable to bend with steering
motions and closely spaced indexed gears would suffer from this
although hardly on road bicycles that don't do large steering angles
as trail riders often do.
Therefore, STI shift cable housing does nothing for the road rider and
even less for downtube sifters (if that is possible). Whether these
are indexed or friction shift levers makes little difference.
Relative length change between cable and housing causes derailleur
position error, small or large depending on steering angle.
Brake cable housing is essentially a stack of steel rings whose stack
height increases when bent into a curve.
Jobst Brandt
|
| | | | |
Date: 09 May 2007 01:20:59
From: still me
Subject: Re: Brake housing for Shift cables?
|
On 08 May 2007 23:24:40 GMT, jobst.brandt@stanfordalumni.org wrote:
>Someone writes:
>
>>> It'll work , as it did for years before the new style, but without
>>> the precision needed for crisp index shifting.
>
>> I probably should have mentioned that I am a friction guy. Will
>> "shift cable housing" help out friction shifting precision also?
>
>STI shift cable housing is specifically designed to be constant length
>even when bending in a curve by having its steel strands in a helix,
>similar to brake and shift cables. The reason for this is that shift
>levers ON the bars requires the shift cable to bend with steering
>motions and closely spaced indexed gears would suffer from this
>although hardly on road bicycles that don't do large steering angles
>as trail riders often do.
>
>Therefore, STI shift cable housing does nothing for the road rider and
>even less for downtube sifters (if that is possible). Whether these
>are indexed or friction shift levers makes little difference.
>Relative length change between cable and housing causes derailleur
>position error, small or large depending on steering angle.
>
>Brake cable housing is essentially a stack of steel rings whose stack
>height increases when bent into a curve.
>
>Jobst Brandt
Thanks boys !
|
| | | |
Date: 08 May 2007 18:12:02
From: A Muzi
Subject: Re: Brake housing for Shift cables?
|
> A Muzi <am@yellowjersey.org> wrote:
>> It'll work , as it did for years before the new style, but without the
>> precision needed for crisp index shifting.
still me wrote:
> I probably should have mentioned that I am a friction guy. Will "shift
> cable housing" help out friction shifting precision also?
I don't notice any difference. The pilot has to overshoot and then
correct on a classic system and we humans quickly adapt to the slight
casing difference unconsciously. Use what you have and oil the wire, it
will be OK either way.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971
|
| | | |
Date: 08 May 2007 18:07:29
From:
Subject: Re: Brake housing for Shift cables?
|
Someone writes:
>> It'll work , as it did for years before the new style, but without
>> the precision needed for crisp index shifting.
> I probably should have mentioned that I am a friction guy. Will
> "shift cable housing" help out friction shifting precision also?
Shift cable housing is specifically designed to be constant length
even when bending in a curve by having its steel strands in a helix,
similar to brake and shift cables. The reason for this is that shift
levers ON the bars requires the shift cable to bend with steering
motions and closely spaced indexed gears would suffer from this
although hardly on road bicycles that don't do large steering angles
as trail riders often do.
Therefore, STI shift cable housing does nothing for the road rider and
even less for downtube sifters (if that is possibler). Whether these
are indexed or friction shift levers makes little difference.
Relative length change between cable and housing causes derailleur
position error, small or large depending on steering angle.
Brake cable housing is essentially a stack of steel rings whose stack
height increases when bent into a curve.
Jobst Brandt
|
| |
Date: 07 May 2007 09:27:18
From: Mark
Subject: Re: Brake housing for Shift cables?
|
still me wrote:
> I know the other way around is a no-no, but is it OK to use brake
> housing for shift cables (assuming physical cable end fit is OK) ?
>
If you have indexed ("click") shifting, it will work poorly with brake
housing. If you have the now nearly extinct non-indexed shifting, it
will work great.
Just last week I swapped out coiled brake-like housing for proper
non-compressible shift housing on a junker's shifters. I was amazed at
the improvement. Ironically, the coiled brake-like housing was labeled
"Shimano SIS".
Mark J.
|
| | |
Date: 07 May 2007 13:08:04
From: me
Subject: Re: Brake housing for Shift cables?
|
"Mark" <remove.mandmlj.this@remove.comcast.this.net > wrote in message
news:aYWdnXqxSen1zqLbnZ2dnUVZ_sapnZ2d@comcast.com...
> still me wrote:
>> I know the other way around is a no-no, but is it OK to use brake
>> housing for shift cables (assuming physical cable end fit is OK) ?
>>
> If you have indexed ("click") shifting, it will work poorly with brake
> housing. If you have the now nearly extinct non-indexed shifting, it will
> work great.
>
> Just last week I swapped out coiled brake-like housing for proper
> non-compressible shift housing on a junker's shifters. I was amazed at
> the improvement. Ironically, the coiled brake-like housing was labeled
> "Shimano SIS".
>
> Mark J.
No, it is not OK to use brake housing for indexed shifters.
|
|
