Recommended road tube

Do you have a bare wire in the sidewall of the tyre??

Ed Swierk said:

I've been getting a lot of flats recently with tubes from Performance
(700x19-25c, Presta valve). They seem to get flat in the same place
every time--about 4 spokes away from the valve--yet I can't find any
defect in the tire or rim that would cause a puncture.

It always looks like the tube material simply separates and forms a
hole. If I partially inflate a new tube, I don't see any defects, but
after a few rides, I get a flat. I normally inflate the tires to the
recommended 115 psi. So, I'm suspecting a quality control problem that
might have caused a bad batch of Performance tubes.

When you take the tire off next time (regardless of tube), take your thumb
and run it along the rim and tire (both!). Use a good bit of pressure.
Keep some swabs on hand for when you cut yourself on something. Tubes do
not separate into small holes, the holes are made by another object.

Ed Swierk <[email hidden]> aszonygya:
:I've been getting a lot of flats recently with tubes from Performance
🙁700x19-25c, Presta valve). They seem to get flat in the same place every
:time--about 4 spokes away from the valve--yet I can't find any defect in
:the tire or rim that would cause a puncture.

I use the same and works fine for me. In fact, all regular [cheap] tubes work
just fine for me. I think the tire matters. I use the Armadillo by
Specialized and the Continental touring tire. I keep the pressure up and I am
careful about installing the tube/tire.

/Paul

"Commuter Cyclist" <[email hidden]> wrote in message
news:pan.2004.06.12.21.44.28.758068@cyclist...

Quoted message said:

Ed Swierk said:

I've been getting a lot of flats recently with tubes from Performance
(700x19-25c, Presta valve). They seem to get flat in the same place
every time--about 4 spokes away from the valve--yet I can't find any
defect in the tire or rim that would cause a puncture.

Look very closely for a small sliver of glass that is between the tread and
casing that is only evident with pressure on the outside of the tire. I went
through four flats on a tire once before I finally located the culprit. Last
week I had a similar problem but only one flat. I kept looking until I
located the intruder I knew HAD to be there.

Having said the above I have also gone through batches of tubes with seam
flaws that failed after weeks or months of use. Bad tubes included light
weight Continental, Michelin and the worst, Salsa. Solution: heavy generic
Blackburn. 20 more grams and no more flats.
Bill Brannon

Ed Swierk <[email hidden]> wrote in message news:<Pine.WNT.4.56.0406121312590.936@slusher>...

Quoted message said:

I've been getting a lot of flats recently with tubes from Performance
(700x19-25c, Presta valve). They seem to get flat in the same place every
time--about 4 spokes away from the valve--yet I can't find any defect in
the tire or rim that would cause a puncture.

It always looks like the tube material simply separates and forms a hole.
If I partially inflate a new tube, I don't see any defects, but after a
few rides, I get a flat. I normally inflate the tires to the recommended
115 psi. So, I'm suspecting a quality control problem that might have
caused a bad batch of Performance tubes.

Can anyone recommend a more reliable brand of road tube? I'm using a set
of Avocet FasGrip K20 700x25c tires (well-worn, which I suspect doesn't
help the tubes last any longer).

--Ed

You are running the tube a little at the end of it's recommended size,
so it is stretched. I had this problem with some lightweight
Kenda-made Salsa tubes that failed at what looked like a
circumferential seam near the valve. The tubes were rated to 23mm but
I was using them on a tire about 24mm. Mind you, it took many
hundreds of miles for them to start separating, but they did. When I
looked at the hole and noticed it at this "seam", I pulled it, the
hole got bigger. I could also see other holes forming as breaks from
the outside.

I would get a tube more appropriately sized.

Robin Hubert
[email hidden]

"Robin Hubert" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

You are running the tube a little at the end of it's recommended size,
so it is stretched. I had this problem with some lightweight
Kenda-made Salsa tubes that failed at what looked like a
circumferential seam near the valve. The tubes were rated to 23mm but
I was using them on a tire about 24mm. Mind you, it took many
hundreds of miles for them to start separating, but they did. When I
looked at the hole and noticed it at this "seam", I pulled it, the
hole got bigger. I could also see other holes forming as breaks from
the outside.

I would get a tube more appropriately sized.

Robin Hubert
[email hidden]

I bought six Salsa tubes. After three failures at the above referenced seam
I checked the others. Two of them failed when inspected without ever being
ridden. The other wasn't worth the risk. I took them all back to the LBS who
reluctantly refunded my money. I guess they were kind of stuck because my
problem was not unique and had decided not to sell Salsa tubes any more.
Bill Brannon

Ed Swierk said:

I've been getting a lot of flats recently with tubes from Performance
(700x19-25c, Presta valve). They seem to get flat in the same place every
time--about 4 spokes away from the valve--yet I can't find any defect in
the tire or rim that would cause a puncture.

It always looks like the tube material simply separates and forms a hole.
If I partially inflate a new tube, I don't see any defects, but after a
few rides, I get a flat. I normally inflate the tires to the recommended
115 psi. So, I'm suspecting a quality control problem that might have
caused a bad batch of Performance tubes.

Can anyone recommend a more reliable brand of road tube? I'm using a set
of Avocet FasGrip K20 700x25c tires (well-worn, which I suspect doesn't
help the tubes last any longer).

--Ed

I'm using the same brand, and I've found they are a little big for 700c
rims. My tires folded on themselves and wore through after about fifty
miles. The fix: just very carefully seating the tubes to ensure they
don't fold over themselves.

Ed Swierk <[email hidden]> wrote in message news:<Pine.WNT.4.56.0406121312590.936@slusher>...

Quoted message said:

I've been getting a lot of flats recently with tubes from Performance
(700x19-25c, Presta valve). They seem to get flat in the same place every
time--about 4 spokes away from the valve--yet I can't find any defect in
the tire or rim that would cause a puncture.

I got one of those last week. New Performance tube, 700x19-26, presta.
Pinhole on the inside, about an inch from the stem, could not find the
cause.

dkl