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Path: news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: zen cycle <funkmasterxx@hotmail.com> Newsgroups: rec.bicycles.tech Subject: Re: Ebay prices Date: Wed, 9 Apr 2025 06:30:21 -0400 Organization: A noiseless patient Spider Lines: 76 Message-ID: <vt5i7u$e69l$2@dont-email.me> References: <k%PkP.1382875$DYF8.1030138@fx14.iad> <vn0kbe$2bdut$1@dont-email.me> <vn2g92$2p200$1@dont-email.me> <vn2q7b$2qrv6$2@dont-email.me> <ETCIP.1543637$OrR5.922382@fx18.iad> <vsv1po$264q2$1@dont-email.me> <HpUIP.2032764$_N6e.1674951@fx17.iad> <vt3l2a$2jp43$8@dont-email.me> <r15bvjd2bg61csqpejkqflfitv42ctdj2c@4ax.com> <4bqbvj9t677kjrkqf3dnkqol82l8vvlasl@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit Injection-Date: Wed, 09 Apr 2025 12:30:23 +0200 (CEST) Injection-Info: dont-email.me; posting-host="cda66a8c2cfbed43c670762c4e03b5ec"; logging-data="465205"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX190DCgfu3qx8vBoHgTWui13vMpjaA6boto=" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:Z4xcnwuV2MoIkrBb6mKNtL3Wwgw= In-Reply-To: <4bqbvj9t677kjrkqf3dnkqol82l8vvlasl@4ax.com> Content-Language: en-US On 4/9/2025 12:04 AM, Jeff Liebermann wrote: > On Tue, 08 Apr 2025 18:29:26 -0300, Shadow <Sh@dow.br> wrote: > >> On Tue, 8 Apr 2025 13:06:16 -0400, Frank Krygowski >> <frkrygow@sbcglobal.net> wrote: >> >>> On 4/7/2025 2:01 PM, cyclintom wrote: >>>> On Sun Apr 6 19:12:56 2025 Frank Krygowski wrote: >>>>> On 4/6/2025 6:04 PM, cyclintom wrote: >>>>>> >>>>>> Yesterday, I was fixing flats on three different bikes. I went up to Robinson's and picked up some new tubes because the flats are all pin holes and I've never successfully repaired those. I fix one hole and another appears 3 inchs away. Nothing in the tire. >>>>> >>>>> Wow. So many problems! >>>> >>>> So now Frank is telling us that he never gets flats. >>> >>> Not at all, Tom! I've described here getting something like three flats >>> within 15 miles. I've described other flats as well. Flats are a normal >>> part of bicycling. >>> >>> But I do know how to successfully fix flats. Your "I've never >>> successfully repaired those. I fix one hole and another appears 3 inchs >>> away." is very, very unusual. >> >> If there's a piece of fine wire in the tire repairing the >> inner tube will not prevent a flat a few minutes later. >> Fine wire is very common in our asphalt, which is made of >> recycled truck/car tires (plus other stuff). It's the tires that have >> those nasty stainless steel wires. >> I always run my finger round the inside of the tire before >> replacing the repaired inner tube. I usually simultaneously find the >> culprit and puncture my finger.. >> []'s > > Ouch. I use a small cotton ball for locating splinters. It should > also work for steel wires. > > Examples: > <https://www.bikeforums.net/17442640-post6.html> > > (from Sheldon Brown): > <https://www.sheldonbrown.com/flats.html#tireinspection> > > I'm not quite ready to become a believer but it's a start. > > I ran some crude tests to see what it would take to manually force a > thin wire through a bicycle tire and tube. I started with the wire > perpendicular to the tire. If the wire was to thin, it would buckle > as soon as it touched the tire. Same if the wire arrived at an angle, > same buckling. > > A heavier wire would buckle less but unless the wire was really stiff, > it would not break the surface of the tire. I could almost push a > sharpened bicycle spoke through the tread, but anything that was > moderately flexible would buckle before penetrating. If someone has a > way to demonstrate how a wire from an automobile tire might penetrate > the bicycle tire and tube, I want to try it. > > The use of recycled tires for Rubber Modified Asphalt (RMA) was also > mentioned. Supposedly, the steel is removed from the shredded tire by > magnetic separation: > "Maximizing metal removal in rubber tire recycling" > <https://www.recyclingproductnews.com/article/33699/maximizing-metal-removal-in-rubber-tire-recycling> > > "Steel-belted tires a source for flats" > <https://rayhosler.wordpress.com/2016/05/15/steel-belted-tires-a-source-for-flats/> > "A vibratory feeder feeds rubber crumb onto a high intensity magnetic > field of the head pulley, pulling out tiny wires that may still be > embedded in the crumb rubber material. This results in an extremely > pure product." > > I can tell you from personal experience that tiny wire bits do in fact manage to work their way through a bike tire. I get at least one flat a year that way.