tyre (tire) repair

Tony Sweeney said:

This question was asked in the recent thread about how many km people
got from their tyres but went unanswered.

Is there a way to repair a large cut in a tyre?
The kind of cut that you can see a small amount of tube through when
fully inflated because the casing has been cut through significantly
enough. And which I seem to consistently puncture in the same spot as a
consequence (which would make perfect sense!).

That's probably not a puncture... I'd bet it's a blowout.

Quoted message said:

(The question goes for the main, contact portion of the tyre and the
sidewall.)

I have used a section of old, worn tyre with the bead cut off as a tyre
boot to get me home after such a puncture. Is that the best/only
permanent repair? Are there any disadvantages to riding around with a
tyre boot like this?

For sidewall cuts of that type, I use a folded wrapper from a snack bar
betwixt tyre and tube. I've tried the old tyre with the removed bead --
the cut edge of the old tyre rubbed the tube and eventually caused a flat.

I have a folded wrapper in the front tyre of my commuter bike right now,
and it's been there for several hundred miles. The tyre bulges ever so
slightly at that point, and you can see the wrapper from the outside,
but it is not noticeable when riding.

I don't know if this works in the tread portion of a tyre, and it might
not work with all combinations of tyre, cut, and wrapper. A good rule of
thumb: if you can boot a sidewall cut without leaving a significant
bulge, it will probably continue to work indefinitely.

As usual, usenet advice is worth the price you paid. Don't blame me if
your booted tyre fails. :^)

--
Dave
dvt at psu dot edu

Everyone confesses that exertion which brings out all the powers of body
and mind is the best thing for us; but most people do all they can to
get rid of it, and as a general rule nobody does much more than
circumstances drive them to do. -Harriet Beecher Stowe, abolitionist and
novelist (1811-1896)

dvt said:

Tony Sweeney said:

This question was asked in the recent thread about how many km people
got from their tyres but went unanswered.

Quoted message said:

Is there a way to repair a large cut in a tyre?
The kind of cut that you can see a small amount of tube through when
fully inflated because the casing has been cut through significantly
enough. And which I seem to consistently puncture in the same spot as a
consequence (which would make perfect sense!).

That's probably not a puncture... I'd bet it's a blowout.

Quoted message said:

(The question goes for the main, contact portion of the tyre and the
sidewall.)

Quoted message said:

I have used a section of old, worn tyre with the bead cut off as a tyre
boot to get me home after such a puncture. Is that the best/only
permanent repair? Are there any disadvantages to riding around with a
tyre boot like this?

For sidewall cuts of that type, I use a folded wrapper from a snack bar
betwixt tyre and tube. I've tried the old tyre with the removed bead --
the cut edge of the old tyre rubbed the tube and eventually caused a flat.

I have a folded wrapper in the front tyre of my commuter bike right now,
and it's been there for several hundred miles. The tyre bulges ever so
slightly at that point, and you can see the wrapper from the outside,
but it is not noticeable when riding.

I don't know if this works in the tread portion of a tyre, and it might
not work with all combinations of tyre, cut, and wrapper. A good rule of
thumb: if you can boot a sidewall cut without leaving a significant
bulge, it will probably continue to work indefinitely.

As usual, usenet advice is worth the price you paid. Don't blame me if
your booted tyre fails. :^)

I don't know, good tires can be found from $20 on up, maybe cheaper,
so are relatively cheap. Why risk a blow out, especially on a nice
long descent for trying to save a buck or two. I say replace the tire
and be careful of where you ride!

Tony Sweeney said:

This question was asked in the recent thread about how many km
people got from their tyres but went unanswered.

Is there a way to repair a large cut in a tyre?
The kind of cut that you can see a small amount of tube
through when fully inflated because the casing has been cut
through significantly enough. And which I seem to consistently
puncture in the same spot as a consequence (which would make
perfect sense!).

(The question goes for the main, contact portion of the tyre
and the sidewall.)

I have used a section of old, worn tyre with the bead cut off
as a tyre boot to get me home after such a puncture. Is that
the best/only permanent repair? Are there any disadvantages to
riding around with a tyre boot like this?

Personally, I now throw out any tyre that's had the casing
damaged enough to expose cut cords.

I've found that they're likely to fail over time as cord
separation slowly spreads from the cut. While this might start
off very slowly, eventually the sidewalls will bulge sideways
as the cut opens up. If that's unnoticed or ignored, the tube
can blow out. And I mean go off with a bang like a gunshot.

John

Park Tools makes a tire patch - sold in three piece package for about 5
Euro. It is a big patch with strong glue on it. With minor to medium
sidewall cuts this repair will last till the tire is otherwise worn out.
For other cuts it will most likely at least get you thru the day.
I carry a tire patch with the repair kit - and don't need one each year.

Ivar of Denmark

Den 30.07.2007 kl. 16:30 skrev Tony Sweeney <[email hidden]>:

Quoted message said:

This question was asked in the recent thread about how many km people
got from their tyres but went unanswered.

Is there a way to repair a large cut in a tyre?
The kind of cut that you can see a small amount of tube through when
fully inflated because the casing has been cut through significantly
enough. And which I seem to consistently puncture in the same spot as a
consequence (which would make perfect sense!).

(The question goes for the main, contact portion of the tyre and the
sidewall.)

I have used a section of old, worn tyre with the bead cut off as a tyre
boot to get me home after such a puncture. Is that the best/only
permanent repair? Are there any disadvantages to riding around with a
tyre boot like this?

I have tried various types of glue but none have stayed in place.

Tony

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