STI shifters destroy cables?

[Dion Dock]

My wife and I have experienced 4-5 instances of shifter cable failure in
Dura Ace 8 and 9 speed shifters. The failure is always the same, the
"anchor" in the shifter cable is ripped off, leaving an extremely frayed
cable. It happens when downshifting to a larger rear sprocket.

I've never seen anyone mention this before, but I can't believe we're the
only people who experience this problem.

thanks,
-Dion

 

[Bill Sornson]

Dion Dock wrote:
> My wife and I have experienced 4-5 instances of shifter cable failure
> in Dura Ace 8 and 9 speed shifters. The failure is always the same,
> the "anchor" in the shifter cable is ripped off, leaving an extremely
> frayed cable. It happens when downshifting to a larger rear sprocket.
>
> I've never seen anyone mention this before, but I can't believe we're
> the only people who experience this problem.

Read my 10-minute-old post in the "STI Rear Cable Life" thread. (My
brifters are Ultegra, but same thing happened -- albeit to only ONE cable so
far.)

Grinder Bill

 

[Mike Jacoubowsky]

> My wife and I have experienced 4-5 instances of shifter cable failure in
> Dura Ace 8 and 9 speed shifters. The failure is always the same, the
> "anchor" in the shifter cable is ripped off, leaving an extremely frayed
> cable. It happens when downshifting to a larger rear sprocket.
>
> I've never seen anyone mention this before, but I can't believe we're the
> only people who experience this problem.

As mentioned elsewhere, this may be an indication of too much friction in
your cables & housing. Look for burrs on the ends of the housing,
poor-quality ferrules, housing where the outer plastic sheathing has
recessed a bit, exposing the metal underneath... grease where the cables
travel under the frame... all are potential causes of premature cable
failure.

--Mike Jacoubowsky
Chain Reaction Bicycles
www.ChainReaction.com
Redwood City & Los Altos, CA USA
"Dion Dock" <[email protected]> wrote in message
news:[email protected]...
> My wife and I have experienced 4-5 instances of shifter cable failure in
> Dura Ace 8 and 9 speed shifters. The failure is always the same, the
> "anchor" in the shifter cable is ripped off, leaving an extremely frayed
> cable. It happens when downshifting to a larger rear sprocket.
>
> I've never seen anyone mention this before, but I can't believe we're the
> only people who experience this problem.
>
> thanks,
> -Dion
>
>

 

[Bruce Graham]

In article <[email protected]>,
[email protected] says...
> As mentioned elsewhere, this may be an indication of too much friction in
> your cables & housing. Look for burrs on the ends of the housing,
> poor-quality ferrules, housing where the outer plastic sheathing has
> recessed a bit, exposing the metal underneath... grease where the cables
> travel under the frame... all are potential causes of premature cable
> failure.
>
> --Mike Jacoubowsky
> Chain Reaction Bicycles
>
I got about 10,000Km out of my last cable, which then started to fray as
described in this thread. I assumed that was normal, but you have just
prompted me to grease under the frame in future.