Weird slow leak.?

[Paulus]

Anybody know what is going on here?

If I pump up my tube and tyre it will stay pumped up for at least a week if I do not ride my bike.
When I ride my bike, the wheel stayed pumped up. About 10 minutes after I get off my bike, the tyre
goes flat in about 5 minutes, but if I pump it up and do not ride it, the tyre stays inflated!

Anyone had this happen before?

Paul

 

[crazy6r54]

Take the tube out, run your fingers in side the tire. Run those fingers over every inch of the
inside of the tire over and over looking for sharpe objects to ***** your finger. The likes of
glass,wire, metal, ect. You find any of these things pull it out with tweezer or neddlenose pliers.
Find hole in tube and patch it or replace with new tube.

I MTB 2004

 

[Werehatrack]

On Thu, 4 Mar 2004 22:03:20 +1100, "Paulus" <[email protected]> may
have said:

>Anybody know what is going on here?
>
>If I pump up my tube and tyre it will stay pumped up for at least a week if I do not ride my bike.
>When I ride my bike, the wheel stayed pumped up. About 10 minutes after I get off my bike, the tyre
>goes flat in about 5 minutes, but if I pump it up and do not ride it, the tyre stays inflated!
>
>Anyone had this happen before?

Carefully inspect the tube at the base of the valve. I suspect you'll find your leak there.

--
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Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.

 

[Allan Butler]

Paul

One other possibility is that the rim tape is not covering the nipple holes in your rim.

Check to make certain that there is no place for the tube to work through into the cavity where
anipple is. Even a REAL SMALL space will let this happen.

 

[Carl Fogel]

Werehatrack <[email protected]> wrote in message news:<[email protected]>...
> On Thu, 4 Mar 2004 22:03:20 +1100, "Paulus" <[email protected]> may have said:
>
> >Anybody know what is going on here?
> >
> >If I pump up my tube and tyre it will stay pumped up for at least a week if I do not ride my
> >bike. When I ride my bike, the wheel stayed pumped up. About 10 minutes after I get off my bike,
> >the tyre goes flat in about 5 minutes, but if I pump it up and do not ride it, the tyre stays
> >inflated!
> >
> >Anyone had this happen before?
>
> Carefully inspect the tube at the base of the valve. I suspect you'll find your leak there.

Dear Werehatrack,

Even if this base-of-the-valve idea isn't the solution, I like it.

But what's the explanation? Or basis?

Carl Fogel

 

[Zeeexsixare]

> But what's the explanation? Or basis?

I had a flat near the valve stem. I used a glueless patch and a C-clamp to smash the whole thing
down. It's the only way I've been able to get glueless patches to work correctly.

In this case, when I C-clamped the thing down near the stem, I inadvertently severed the stem from
the tube. It wasn't immediately visible, so when I pumped up the tube, it held until 40psi. Then
PSSSSSSSSSSSSHHHH as if the patch had failed. I said, "glueless never again!" and took it out,
surprised to find that the patch was intact and just fine. I pumped it up again, PSSSHH...

I went over the whole tube while inflated and noticed the air coming out when I was near the stem.
I played around and found the hole. It didn't leak air unless the thick rubber was pulled apart
either by compression on one side or twisting or by >40psi pressures. Needless to say, I had to
dump that one.

--
Phil, Squid-in-Training

 

[Werehatrack]

On Thu, 4 Mar 2004 20:48:54 -0500, "ZeeExSixAre"
<[email protected]> may have said:

>> But what's the explanation? Or basis?
>
>I had a flat near the valve stem. I used a glueless patch and a C-clamp to smash the whole thing
>down. It's the only way I've been able to get glueless patches to work correctly.
>
>In this case, when I C-clamped the thing down near the stem, I inadvertently severed the stem from
>the tube. It wasn't immediately visible, so when I pumped up the tube, it held until 40psi. Then
>PSSSSSSSSSSSSHHHH as if the patch had failed. I said, "glueless never again!" and took it out,
>surprised to find that the patch was intact and just fine. I pumped it up again, PSSSHH...
>
>I went over the whole tube while inflated and noticed the air coming out when I was near the stem.
>I played around and found the hole. It didn't leak air unless the thick rubber was pulled apart
>either by compression on one side or twisting or by >40psi pressures. Needless to say, I had to
>dump that one.

Bingo. I had something very similar happen to me. Leaks anywhere else tend to be fairly
straightforward; pump up, leak down. In the area at the base of the valve, they can behave oddly.

--
My email address is antispammed; pull WEEDS if replying via e-mail.
Typoes are not a bug, they're a feature.
Words processed in a facility that contains nuts.