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Old 05-26-08, 10:43 AM   #1
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Cable and Housing Opinions

Hello all. I was just reading a thread about the difference between DA and Ultegra is more based on Cable and HSG set-up. I'm not to worried about that stuff as I'm wondering how all you guys set up repairs when it calls for new shift cables and housing.

When I was being trained the mechanic who was half old/school taught me to use 5mm shift housing as often as possible, unless the customer preferred/didn't want to pay the extra dollar/ft. He also used metal ferrules, greased the frame at the ferrule holders. Lastly he used either dumonde-tech or triflow to lube the cable.

His justifications were that nylon ferrules failed and would allow the shift housings wires to pull through and fail. This would cause mushy shifting and ghost shifting. He also believed that 4mm housing also failed prematurely. He didn't like greasing the cables because it would gunk up more so than a light lube. Metal ferrules are stronger. And greasing the frame prevented creaking that nylon ferrules would have suppressed.

So I suppose I just wanna know what all you mechanics do and your justifications... I suppose I know both sides I'd just like to know what you guys think. Thanks.
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Old 05-26-08, 05:11 PM   #2
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I've always used the factory 4mm housing and plastic ferrules that come with STI and Ergo brifters and most barcons. So far, I've had no housing or ferrule failures and shifting has always remained dependable. Both Shimano and Campy provide their housings already containing grease so they seem to think it's ok.
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Old 05-26-08, 06:06 PM   #3
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4mm for shifter cable and 5mm for brakes.
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Old 05-26-08, 06:12 PM   #4
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Not all nylon ferrules are created equal. Some or just nylon and some have brass (I think it's brass) molded into the end of the ferrule - this prevents the wound cables in the housing from pulling through.

I have seen this problem with both STI and Jaqwire der cables but not with Campagnolo (although I'm sure it's happened). Most often the ferrule used was the nylon only one and this led to the failure. I have also seen metal ferrules fail this way as well but it doesn't happen very often.
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