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Broken gear cable in Shimano 105 STI shifter

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Broken gear cable in Shimano 105 STI shifter

Old 12-16-15, 06:57 PM
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So, just went through replacing gear cables on a Shimano Ultegra 6700 on after only 5K km.

Front gear cable was in good condition, but even that couldn't be pushed out through the outer cable.
Rear gear cable was in horrible condition, but went from OK to awful in short order. A month or so ago it started shifting slightly sluggish, then this past weekend hanging two cogs back when shifting to smaller cogs.

Even after cutting outer cable, the friction sheath came out adhered to inner cable.

Moral. Inspect far more often. If there are symptoms, it's too late.

-mr. bill
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Old 12-16-15, 07:03 PM
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Don't bother to lube the cable around the shifter spool (but a dab on the end as it seats into the spool is not wrong). The right thing to do is to monitor the cable and replace before it starts to fray. Sure this is a bit open ended but for the few dollars it costs compared to the cost of a bad ride or worse a replaced shifter. Well, you do the math.

As to why Shimano doesn't say anything about cable replacement- they do suggest regular inspection of all their parts. Also their primary business is selling to bike companies, not the aftermarket. And bike shops are the primary source of bike maintenance (within the bike industry), although the Interweb does provide information for those who ask. Andy.
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