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From: Roger Merriman <roger@sarlet.com>
Newsgroups: rec.bicycles.tech
Subject: Re: Very Slow Leaks.
Date: 7 May 2025 22:55:11 GMT
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cyclintom <cyclintom@yahoo.com> wrote:
> On Tue May 6 06:09:07 2025 Roger Merriman  wrote:
>> cyclintom <cyclintom@yahoo.com> wrote:
>>> On Mon May 5 18:28:41 2025 Roger Merriman  wrote:
>>>> cyclintom <cyclintom@yahoo.com> wrote:
>>>>> I have very good tires on the BMC. (Gatorskins) But it has continuous
>>>>> problems with slow leaks appearing first in one tire and then the other.
>>>>> The wheels are Campagnolo Sirocco so it is unlikely that there are
>>>>> imperfections in the rims and I use Specialized tubes whenever I can get
>>>>> the proper size. And yet, when I leave the bike sitting for a month or so
>>>>> one or the other of the tires is nearly fully pumped up and the other completely flat.
>>>>> 
>>>>> Anyone have any suggestions?
>>>>> 
>>>> 
>>>> What are the punctures can you see any holes? Gatorskins are tough but not
>>>> impervious, could be the value be that a fault or just user error ie isn?t
>>>> fully closed and so on.
>>> 
>>> 
>>> 
>>> 
>>> They look like hair thin wire punctures bot there are usually no trace of
>>> a wire in the tire inside or out. To even find them you have to pump the
>>> tube way up and put it under water and look for a very slow leak which
>>> mafes it almost impossible to patch. So I have to replace the innertube.
>>> 
>> As long as you can find the hole or the area the patch should be fine, it?s
>> not like tubeless where you need to push the plug in and so on!
>> 
>> If it is just small wires then it?s absolutely the sort of thing that
>> Tubeless is good at! Even if it?s in my naughty books at moment, as I
>> unwisely fitted a far to lightweight rear tyre which has punctured fairly
>> dramatically twice in other a week, great in the front but way too fragile
>> for the rear!
>> 
>> So back to the tyres I?ve been running for almost 10 years!
> 
> 
> 
> 
> Many of these leaks are so slow that they are only a bubble every second.
> Once located I use a marking pen to make an X but the glue lifts that off
> and I end up putting the patch in the wrong spot.
> 
Yes that’s a slow leak! Which is I’d assume the most common, for all folks,
certainly for myself just occasionally might get a pinch flat and a rather
larger hole or rather two rips which I generally took to be new tube day.

But for myself my tubed bikes tend to have punctures so infrequently that
the tube is old/and or valve is going.

Roger Merriman