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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
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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.