Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail From: AMuzi Newsgroups: rec.bicycles.tech Subject: Re: Ebay prices Date: Wed, 9 Apr 2025 07:31:25 -0500 Organization: Yellow Jersey, Ltd. Lines: 116 Message-ID: References: <4bqbvj9t677kjrkqf3dnkqol82l8vvlasl@4ax.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 8bit Injection-Date: Wed, 09 Apr 2025 14:31:27 +0200 (CEST) Injection-Info: dont-email.me; posting-host="45edc2476f05f19d57496dfea048c93e"; logging-data="643675"; mail-complaints-to="abuse@eternal-september.org"; posting-account="U2FsdGVkX1/WnsV5GV7zs5ay+kT2J+Jb" User-Agent: Mozilla Thunderbird Cancel-Lock: sha1:3zGEZ1hZHrralCo2CeolOdxThM8= In-Reply-To: Content-Language: en-US Bytes: 5316 On 4/9/2025 5:30 AM, zen cycle wrote: > On 4/9/2025 12:04 AM, Jeff Liebermann wrote: >> On Tue, 08 Apr 2025 18:29:26 -0300, Shadow wrote: >> >>> On Tue, 8 Apr 2025 13:06:16 -0400, Frank Krygowski >>> 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: >> >> >> (from Sheldon Brown): >> >> >> 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" >> > maximizing-metal-removal-in-rubber-tire-recycling> >> >> "Steel-belted tires a source for flats" >> > 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. +1 In theory perhaps difficult but in the actual world all day long. -- Andrew Muzi am@yellowjersey.org Open every day since 1 April, 1971