Strange Punctures

Bob C said:

At 1500 km my Vittorio tubes on 23x700 tyres have punctured front and back
within weeks of each other - but both holes are on the inside of the tube
against smooth unsullied (and 19 months old) rim tape. i.e. no sign of
nipple, spoke ends or rim tape mis-alignment. Also no sign of damage to the
tyre.

What gives - I thought punctures happened because spiky things got into the
tyre!

What sort of rim tape is it? Do you run high pressures?

I had a series of rim tape-induced flats even though the rim tape didn't
have any holes in it.

For the sake of ~$5 I'd say replace the rim tape.

--
Nick

Rim tape is marked Vittoria and is as white (apart from the printing) and
clean as whistle - it's only 9 months old after all - not 19 that 1 crept in
somehow.

Bob C
"NoZX6R" <[email hidden]> wrote in message
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Quoted message said:

Bob C said:

At 1500 km my Vittorio tubes on 23x700 tyres have punctured front and
back within weeks of each other - but both holes are on the inside of the
tube against smooth unsullied (and 19 months old) rim tape. i.e. no sign
of nipple, spoke ends or rim tape mis-alignment. Also no sign of damage
to the tyre.

What gives - I thought punctures happened because spiky things got into
the tyre!

What sort of rim tape is it? Do you run high pressures?

I had a series of rim tape-induced flats even though the rim tape didn't
have any holes in it.

For the sake of ~$5 I'd say replace the rim tape.

--
Nick

Bob C said:

Rim tape is marked Vittoria and is as white (apart from the printing) and
clean as whistle - it's only 9 months old after all - not 19 that 1 crept in
somehow.

Bob C
"NoZX6R" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

Bob C said:

At 1500 km my Vittorio tubes on 23x700 tyres have punctured front and
back within weeks of each other - but both holes are on the inside of the
tube against smooth unsullied (and 19 months old) rim tape. i.e. no sign
of nipple, spoke ends or rim tape mis-alignment. Also no sign of damage
to the tyre.

What gives - I thought punctures happened because spiky things got into
the tyre!

What sort of rim tape is it? Do you run high pressures?

I had a series of rim tape-induced flats even though the rim tape didn't
have any holes in it.

For the sake of ~$5 I'd say replace the rim tape.

--
Nick

Bit new to be failing already then. But I can't think of any other
reason you'd be getting punctures like that.

If you don't have any success elsewhere new tape might be worth a try
anyway since it's cheap anyway.

Good luck.

--
Nick

Bob C said:

At 1500 km my Vittorio tubes on 23x700 tyres have punctured front and back
within weeks of each other - but both holes are on the inside of the tube
against smooth unsullied (and 19 months old) rim tape. i.e. no sign of
nipple, spoke ends or rim tape mis-alignment. Also no sign of damage to the
tyre.

What gives - I thought punctures happened because spiky things got into the
tyre!

--
Regards
Bob C

I got a puncture in the same place on my tube. Rim tape seemed fine, so I just popped a new tube in. I've been riding it for a few weeks without it doing it again.

are they light tubes?

When I was using light-weight tubes (Conti 55g and Tioga 70g) I was getting mysterious punctures were small scuff marks with tiny pin-holes in the middle.
It got to the stage where I was gettign 2 a week!!!

I'm back to Vredestein 100g tubes and Vredestein TriComps tyres, and I've had 1 puncture in about 8000km!!!

"Bob C" wrote

Quoted message said:

At 1500 km my Vittorio tubes on 23x700 tyres have punctured front and
back within weeks of each other - but both holes are on the inside of the
tube against smooth unsullied (and 19 months old) rim tape. i.e. no sign
of nipple, spoke ends or rim tape mis-alignment. Also no sign of damage
to the tyre.

What gives - I thought punctures happened because spiky things got into
the tyre!

I repaired a similar puncture just yesterday. Mine was on the outside (tyre
side) of the tube. There was an almost circular patch where I could see the
tube had been rubbing on the inside of the tyre, causing a puncture. When I
pumped up the tube I could see that the tube was constricted at this point
and so it sort of folded over on itself, and it was these folded edges which
were rubbing on the inside of the tyre. Replaced the tube, and kept the
patched one for emergency spare.

BruceA