Teflon coated cables
03-31-15, 06:45 PM
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Teflon coated cables
So i broke a rear derailer cable on my 2015 TARMAC ELITE, i have 1400 miles since last September.
It was replaced a week ago.
I noticed that the cable diameter on the new Teflon cable is twice as large as the other stock cable so i had the front derailer cable replaced today.
It seems to shift much better.
So do factory bikes have sh**y cables on purpose so you will upgrade or no ... ?
03-31-15, 06:51 PM
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1. Teflon coated inners suck
2. Yes there is small differences in the inners that everyone uses.
3. Teflon coated cables suck because the coating tends to rub off inside the housing and constrict the inner. Even though it's teflon it causes the cable response to slow and shift performance to crap out.
In the future just put some basic stainless inner cables on.
2. Yes there is small differences in the inners that everyone uses.
3. Teflon coated cables suck because the coating tends to rub off inside the housing and constrict the inner. Even though it's teflon it causes the cable response to slow and shift performance to crap out.
In the future just put some basic stainless inner cables on.
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03-31-15, 07:11 PM
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03-31-15, 07:12 PM
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04-01-15, 06:52 AM
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Teflon is old news anyway, as Shimano has moved onto "polymer coated" cables now. If you ask me the real cable innovation will be those highly-polished stainless cables that Jagwire are pushing though.
04-01-15, 06:57 AM
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04-01-15, 07:18 AM
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I have no idea what the polymer is, but I can tell you that the "polymer coated" cables look and act differently to the PTFE coated ones. For one the polymer pills up on the exposed cables, which doesn't happen with the PTFE coated ones. It looks quite unattractive. They seem to work well enough, but then again I never had any issues with just stainless cables.
04-01-15, 07:23 AM
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I have no idea what the polymer is, but I can tell you that the "polymer coated" cables look and act differently to the PTFE coated ones. For one the polymer pills up on the exposed cables, which doesn't happen with the PTFE coated ones. It looks quite unattractive. They seem to work well enough, but then again I never had any issues with just stainless cables.
04-01-15, 11:03 AM
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Another vote for Jagwire Slick Stainless. It's the only cable that has delivered accurate shifting on our tandem. Durable, too. I see they have a new Elite Ultra-Slick cable which I haven't tried.
04-01-15, 11:13 AM
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Their coating still sheds as well. Still crap compared to simple, durable, slick stainless inners.
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04-01-15, 11:58 AM
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I bet coated cables would work really well with inner-coated housing. I doubt it would work too well with plastic on steel. That's always a recipe for disaster.
04-01-15, 12:09 PM
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Back in the day I used to occupy a lab at DuPont's Jackson Laboratory across the hall from where Teflon aka PTFE was discovered. Apparently a lab assistant was tasked with adding some tetrafluoroethylene to a reactor (or something) but found no pressure in the storage cylinder. But the cylinder still contained the full weight. Nothing would come out, so the guy sawed the cylinder in half (horrors!) and found this sticky white goop in the bottom. Voila, Teflon. Apparently some rust in the cylinder or something else had catalyzed the polymerization. Imagine doing something like that today.
04-01-15, 12:33 PM
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Yes, I can't reconcile Shimano's line that these new polymer cables "don't shed" with the visual shedding I see on the exposed parts of the brake cables on my bike. If the cables didn't come with the brakes/brifters in my groupset, I wouldn't have bothered with them.
04-01-15, 05:20 PM
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Back in the day I used to occupy a lab at DuPont's Jackson Laboratory across the hall from where Teflon aka PTFE was discovered. Apparently a lab assistant was tasked with adding some tetrafluoroethylene to a reactor (or something) but found no pressure in the storage cylinder. But the cylinder still contained the full weight. Nothing would come out, so the guy sawed the cylinder in half (horrors!) and found this sticky white goop in the bottom. Voila, Teflon. Apparently some rust in the cylinder or something else had catalyzed the polymerization. Imagine doing something like that today.
04-01-15, 05:44 PM
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Crap is relative, the coated cables may trade some amount of lasting average performance for super smooth gliding when new. The new polymer cables make a noticeable difference compared to uncoated SS when compared back to back, especially for under bartape applications like 5700/6700/7900.
04-01-15, 06:26 PM
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04-01-15, 06:27 PM
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