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Path: ...!news.nobody.at!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!.POSTED!not-for-mail From: Frank Krygowski <frkrygow@sbcglobal.net> Newsgroups: rec.bicycles.tech Subject: Re: Fine Tuning Shifting Date: Thu, 25 Jul 2024 23:07:28 -0400 Organization: A noiseless patient Spider Lines: 26 Message-ID: <v7v3ti$2lkdi$4@dont-email.me> References: <18yoO.17738$iptd.15227@fx36.iad> <v7ue18$2eiph$1@dont-email.me> Reply-To: frkrygow@gmail.com MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Fri, 26 Jul 2024 05:07:30 +0200 (CEST) Injection-Info: dont-email.me; posting-host="9ee3d51075c5b9f1facb3662f626f32b"; logging-data="2806194"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1+nPCjg+8mInoE4LPv51sYB87Ex+Aq1GfA=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:6SYFTqQ0CRgNeINhHfBOjjKoIMQ= Content-Language: en-US In-Reply-To: <v7ue18$2eiph$1@dont-email.me> Bytes: 2187 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. > Casing seats into ferrules and > ferrules into frame stops, but the wires do not change. Right. -- - Frank Krygowski