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From: Zen Cycle <funkmaster@hotmail.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Fine Tuning Shifting
Date: Fri, 26 Jul 2024 15:17:55 -0400
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On 7/25/2024 11:07 PM, Frank Krygowski wrote:
> On 7/25/2024 4:54 PM, AMuzi wrote:
>> On 7/25/2024 2:58 PM, Tom Kunich wrote:
>>> I have a continuing problem with the shifting goin out of adustment. 
>>> In one case the right shifter wire partially broke from my 
>>> over-tightening it but in the other three cases I've had to mark it 
>>> down to cable stretch which Andrew says doesn't exist. But the wires 
>>> did not move and the shifting moved towards shifting into a faster 
>>> gear. I can only assume that wire layup tightened up a little and 
>>> showing those symptom.
>> Bowden wire bicycle gear wires do not stretch. 
> 
> Agreed. And if they did, Tom should be able to use his amazing technical 
> skills to demonstrate it in his basement lab, a la Fogel Laboratories. I 
> suggest hanging a cable from a fixed point on the ceiling, applying 
> varying weights and using a caliper of some sort to measure differences 
> in length. Keep in mind the cable tension necessary to shift a 
> derailleur is probably under ten pounds.
> 

I'm dying to see the comparison data that includes tommy's special 
campagnolo non-stretch shifter cables.

-- 
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