Path: ...!eternal-september.org!feeder3.eternal-september.org!news.eternal-september.org!eternal-september.org!.POSTED!not-for-mail
From: AMuzi <am@yellowjersey.org>
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: <vt5pau$jkir$2@dont-email.me>
References: <k%PkP.1382875$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$8@dont-email.me> <r15bvjd2bg61csqpejkqflfitv42ctdj2c@4ax.com>
 <4bqbvj9t677kjrkqf3dnkqol82l8vvlasl@4ax.com> <vt5i7u$e69l$2@dont-email.me>
MIME-Version: 1.0
Content-Type: text/plain; charset=UTF-8; format=flowed
Content-Transfer-Encoding: 8bit
Injection-Date: Wed, 09 Apr 2025 14:31:27 +0200 (CEST)
Injection-Info: dont-email.me; posting-host="45edc2476f05f19d57496dfea048c93e";
	logging-data="643675"; mail-complaints-to="abuse@eternal-september.org";	posting-account="U2FsdGVkX1/WnsV5GV7zs5ay+kT2J+Jb"
User-Agent: Mozilla Thunderbird
Cancel-Lock: sha1:3zGEZ1hZHrralCo2CeolOdxThM8=
In-Reply-To: <vt5i7u$e69l$2@dont-email.me>
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 <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.

+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