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How to tell when the cables need replacing?(5 posts)

How to tell when the cables need replacing?niteschaos
Jun 25, 2003 7:22 PM
On the stand my gears shift fine, but under the strain of racing I find that the upshifts are awful. I am running a 105 drivertrain with Tiagra shifters with everything at 3200 miles of use on them. I shift to faster gears just fine, but when I try to down-shift I often have to make several request before the chain starts traveling the cassette. I am hearing and feeling clicks from the shifter, but nothing happens. Is the shifter worn out or do I just need to replace the cables? After looking at the wire under the coating rust is showing on the cables in some places and they feel rough to the touch.
It sounds like you need new cables....bent_spoke
Jun 25, 2003 7:33 PM
if you didn't have the rust, I'd say just take them off & clean and lube them. You may also replace the cable housing as that could be where the rust is coming from.

FYI, I was told today by the LBS when buying new cable housings that the Shimano housings are worth the $$ cause the cable has a latteral bias as opposed to being a wound cable. This helps avoid the compression that is experienced when the cable is activated. From what I could gather, this means better shifting & since you race this might be worth considering. The cables are easy to replace, although don't over tighten the bolt that secures the cable at the derailleur or you might slice a few strands of cable like I did...which resulted in the trip to the LBS.
thanks, that's what I thought.niteschaos
Jun 25, 2003 7:48 PM
yeah, the cables really felt rough underneath the housing even though they looked fairly clean. I can get some cables without too much pain so I'll head that way.
you might also...kgg
Jun 26, 2003 6:16 AM
want to replace the housing. The liner gets worn, and the cable doesn't run as smoothly. Replace both cable and housing and you'll get the full benefit.
re: How to tell when the cables need replacing?Ken
Jun 30, 2003 5:40 PM
Cable tension too slack?