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Flat repair



 
 
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  #41  
Old August 12th 18, 01:08 AM posted to rec.bicycles.tech
Andy
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Posts: 115
Default Flat repair

On Friday, August 10, 2018 at 5:36:10 PM UTC-5, jbeattie wrote:
On Friday, August 10, 2018 at 12:33:29 PM UTC-7, Frank Krygowski wrote:
On 8/10/2018 3:09 PM, David Scheidt wrote:
Andy wrote:

:I sanded the tube, applied the patch and clamped it in a vise for an hour.

Did you let the glue dry? the hexane (or whatever they use these
days) is just a solvent. the active part of the glue is the rubber
and vulcanizing activator. then put the
patch on, and press firm (the edge of a patch kit box works great.).
Then put the tube to use.


Here's my method:

First, I seldom patch a tube at the side of the road. Instead I just
change tubes, using the spare tube I always have with the bike. I do
check carefully by feel and visually to be sure the glass, wire or
whatever is not still sticking into the tire. Oh, and I make sure the
punctured tube is tossed sloppily into my handlebar bag so I don't
forget to deal with it at home.

At home, I inflate the tube and find the leak, making sure there isn't
more than one. I mark its position X with chalk.

I clamp a thick dowel (3/4" diameter or so) so it's protruding from my
bench vise. This is my work surface. I lay the X directly on top.

I take my sanding block (used for wood work) and sand the area to be
patched. It's way easier than fiddling with the tiny sandpaper in a
patch kit, and the dowel work surface makes it easy to sand well.

I apply the patch glue, spreading it thin, then wait maybe five minutes
for it to dry.

I peel the backing foil off the patch and carefully stick it in place.

Then I take another dowel, hold it right angles to the one in the vise,
and roll it over the patch to apply pressure, starting in the patch's
center and working toward the outside. It's like rolling cookie dough -
although I've never rolled cookie dough. This makes it easy to apply
quite a bit of force on a small area (the contact point between two
perpendicular cylinders) and I think helps make the bond very strong.

Then I make sure all the air is out of the tube so it's completely flat..
I fold it up, put a rubber band around it and put it back in my bike bag.

For me, the main thing is it's a lot easier to do this in my basement
where I have all the tools immediately ready. And the dowel in the vise
really is a much easier work surface than a flat surface.


Here's my technique -- carry a couple of spares and have boat loads of patched and new tubes at home. Get numerous flats and accumulate a pile of un-repaired tubes. Then, (1) select proper beer; go to man cave and (2) select proper DVD and or BluRay movie, (3) start patching. I use a Sharpie to mark, and I just lay the tube flat and sand. You can apply glue to two or three at a time, depending on chair-back hanging space. Number one dries as you're spreading glue on three, etc. Apply patches like you say, but I just put the tube back on flat surface (I use a plastic cutting board) and press down with plastic tire iron. You could use your finger nail. When the pile is done, I pump them all up and let them sit overnight. There are always two or three that go flat because of super small holes, and then I get out the bucket of water and do those, and then I roll them all up like you say.

Sanding is the important part, IMO. Some tube brands have really nasty mold release or some other finish that you have to get through for a good bond.

I have a patch limit where I just throw the tube away. Nothing set. If I say, "man there are a lot of patches on that tube," then I just throw it away. I've gotten my money out of it. I'll keep patching if it has sentimental value or its some weird size that I need.

-- Jay Beattie.


Good advice.

Because some of the punctures are awefully small I ...

I use Wite out and make marks at 12 and 3 oclock positions so I don't sand off the marks. :-)

Andy
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  #42  
Old August 12th 18, 01:10 AM posted to rec.bicycles.tech
Andy
external usenet poster
 
Posts: 115
Default Flat repair

On Friday, August 10, 2018 at 8:41:51 PM UTC-5, David Scheidt wrote:
AMuzi wrote:
:On 8/10/2018 5:36 PM, jbeattie wrote:
: On Friday, August 10, 2018 at 12:33:29 PM UTC-7, Frank Krygowski wrote:
: On 8/10/2018 3:09 PM, David Scheidt wrote:
: Andy wrote:

:-snip snip-

:I'll keep patching if it has sentimental value or its some
:weird size that I need.
:
: -- Jay Beattie.
:

:Huh.
:I thought I was as maladjusted and psychologically damaged
:as anyone on RBT, but I can't say I ever felt sentiment for
:a tube. YMMV of course.

I had a tube that was made in the month I was born. It had ~25
patches in it. Its demise, at age 35 or so, was a tire that should
have been replaced a few miles before it split down the middle of the
tread.


Were you born during the Depression?

I thought my father was frugal. :-)

Andy
  #43  
Old August 12th 18, 02:14 AM posted to rec.bicycles.tech
David Scheidt
external usenet poster
 
Posts: 1,346
Default Flat repair

Andy wrote:
:On Friday, August 10, 2018 at 8:41:51 PM UTC-5, David Scheidt wrote:
: AMuzi wrote:
: :On 8/10/2018 5:36 PM, jbeattie wrote:
: : On Friday, August 10, 2018 at 12:33:29 PM UTC-7, Frank Krygowski wrote:
: : On 8/10/2018 3:09 PM, David Scheidt wrote:
: : Andy wrote:
:
: :-snip snip-
:
: :I'll keep patching if it has sentimental value or its some
: :weird size that I need.
: :
: : -- Jay Beattie.
: :
:
: :Huh.
: :I thought I was as maladjusted and psychologically damaged
: :as anyone on RBT, but I can't say I ever felt sentiment for
: :a tube. YMMV of course.
:
: I had a tube that was made in the month I was born. It had ~25
: patches in it. Its demise, at age 35 or so, was a tire that should
: have been replaced a few miles before it split down the middle of the
: tread.

:Were you born during the Depression?

The Ford Administration.

:I thought my father was frugal. :-)

There's no reason to toss a tube just because it's got a few holes in
it. These days, I discard tubes hwne the valves fail.

https://imgur.com/a/wKGLIvd



--
sig 40
  #44  
Old August 12th 18, 03:07 AM posted to rec.bicycles.tech
Andy
external usenet poster
 
Posts: 115
Default Flat repair

On Saturday, August 11, 2018 at 8:14:14 PM UTC-5, David Scheidt wrote:
Andy wrote:
:On Friday, August 10, 2018 at 8:41:51 PM UTC-5, David Scheidt wrote:
: AMuzi wrote:
: :On 8/10/2018 5:36 PM, jbeattie wrote:
: : On Friday, August 10, 2018 at 12:33:29 PM UTC-7, Frank Krygowski wrote:
: : On 8/10/2018 3:09 PM, David Scheidt wrote:
: : Andy wrote:
:
: :-snip snip-
:
: :I'll keep patching if it has sentimental value or its some
: :weird size that I need.
: :
: : -- Jay Beattie.
: :
:
: :Huh.
: :I thought I was as maladjusted and psychologically damaged
: :as anyone on RBT, but I can't say I ever felt sentiment for
: :a tube. YMMV of course.
:
: I had a tube that was made in the month I was born. It had ~25
: patches in it. Its demise, at age 35 or so, was a tire that should
: have been replaced a few miles before it split down the middle of the
: tread.

:Were you born during the Depression?

The Ford Administration.

:I thought my father was frugal. :-)

There's no reason to toss a tube just because it's got a few holes in
it. These days, I discard tubes hwne the valves fail.

https://imgur.com/a/wKGLIvd



--
sig 40


With 25 patches, it's probably more puncture resistant that a new tube.

Most of my flats show up when I am at home where it's easy to fix.

I should care a spare.

Should I get one of those mini pumps or is one of those CO2 rigs worth it?

Andy
  #45  
Old August 12th 18, 03:41 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 10,538
Default Flat repair

On 8/11/2018 8:04 PM, Andy wrote:
On Friday, August 10, 2018 at 2:20:57 PM UTC-5, Frank Krygowski wrote:
On 8/10/2018 9:02 AM, Andy wrote:
On Friday, August 10, 2018 at 7:47:58 AM UTC-5, AMuzi wrote:
On 8/10/2018 1:14 AM, Andy wrote:
I had to repair a flat. Have some questions.

Is it best to apply patch to a completly flat tube?

I found a small copper wire in tire.

Is there something to minimize what can puncture tire?

Thanks


Pathing covered in images 4 through 8 he
http://www.yellowjersey.org/tubfix.html

If you find a way to escape flat tires do write back.

One way is to not ride. :-)


One thing that helps is to ride away from the gutter. If you ride on the
section of road that's routinely contacted by car tires, you'll find
it's swept clean of most debris.

Lots of glass shards, wire bits etc. get tossed out of that area toward
the far right, where most cyclists like to ride.

--
- Frank Krygowski


Interesting.

We have frequent street sweepers, so the bike lane is usually pretty clean.


That must be nice. In my area, the street sweepers arrive just twice per
year. And in my area and in other towns I ride in, it's absolutely
normal for the bike lane to have much more debris than the road surface.

About ten to 15 years ago, I cycled a fair amount in the area around
Portland OR, America's renowned bike city. I recall when passing though
a Portland suburb, my daughter and I were laughing at the amount of
trash, broken glass and gravel we had to avoid in the bike lanes. "Why
is this better than the regular traffic lane?"

I once asked a bike advocate out there and I was told that in the city
proper, it's no problem. When you spotted some trash in a bike lane, you
just had to fill out a form telling the location, mail the form, and the
city would sweep it as soon as possible. I thought "Great. That means
it's going to be there for a week."

That happened before the internet was well developed. Jay can tell us
what system they use now around Portland. But as I say, around here the
"system" is to let the debris lie for up to half a year.

--
- Frank Krygowski
  #46  
Old August 12th 18, 03:47 AM posted to rec.bicycles.tech
Frank Krygowski[_4_]
external usenet poster
 
Posts: 10,538
Default Flat repair

On 8/11/2018 10:07 PM, Andy wrote:

Most of my flats show up when I am at home where it's easy to fix.

I should care a spare.


Absolutely! A spare tube, plus a patch kit in case of a two-flat
disaster day. And whatever tools are necessary to make the change.

Should I get one of those mini pumps or is one of those CO2 rigs worth it?


I remember one club ride where several CO2 rigs failed or were wasted -
for example, by trying to fill a tube that still had a hole in it. The
victim eventually borrowed my full sized frame pump to get on the road
again.

So I'd prefer a pump over CO2. And I prefer a full sized frame pump over
a mini pump, since the typical mini pump requires hundreds of strokes to
inflate a tire.

But others disagree, of course. YMMV.

--
- Frank Krygowski
  #47  
Old August 12th 18, 04:05 AM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 144
Default Flat repair

On Sat, 11 Aug 2018 22:41:25 -0400, Frank Krygowski
wrote:

On 8/11/2018 8:04 PM, Andy wrote:
On Friday, August 10, 2018 at 2:20:57 PM UTC-5, Frank Krygowski wrote:
On 8/10/2018 9:02 AM, Andy wrote:
On Friday, August 10, 2018 at 7:47:58 AM UTC-5, AMuzi wrote:
On 8/10/2018 1:14 AM, Andy wrote:
I had to repair a flat. Have some questions.

Is it best to apply patch to a completly flat tube?

I found a small copper wire in tire.

Is there something to minimize what can puncture tire?

Thanks


Pathing covered in images 4 through 8 he
http://www.yellowjersey.org/tubfix.html

If you find a way to escape flat tires do write back.

One way is to not ride. :-)

One thing that helps is to ride away from the gutter. If you ride on the
section of road that's routinely contacted by car tires, you'll find
it's swept clean of most debris.

Lots of glass shards, wire bits etc. get tossed out of that area toward
the far right, where most cyclists like to ride.

--
- Frank Krygowski


Interesting.

We have frequent street sweepers, so the bike lane is usually pretty clean.


That must be nice. In my area, the street sweepers arrive just twice per
year. And in my area and in other towns I ride in, it's absolutely
normal for the bike lane to have much more debris than the road surface.

About ten to 15 years ago, I cycled a fair amount in the area around
Portland OR, America's renowned bike city. I recall when passing though
a Portland suburb, my daughter and I were laughing at the amount of
trash, broken glass and gravel we had to avoid in the bike lanes. "Why
is this better than the regular traffic lane?"

I once asked a bike advocate out there and I was told that in the city
proper, it's no problem. When you spotted some trash in a bike lane, you
just had to fill out a form telling the location, mail the form, and the
city would sweep it as soon as possible. I thought "Great. That means
it's going to be there for a week."

That happened before the internet was well developed. Jay can tell us
what system they use now around Portland. But as I say, around here the
"system" is to let the debris lie for up to half a year.


:-) In this remote and primitive country we have "road sweepers".
People that work for the highway department and sweep the streets.
They wear a uniform and seem to come to work about 05:00, or
thereabouts and apparently work an 8 hour day.

It appears that each sweeper is assigned a specific section of road
and I know, from talking with the sweepers that there is an inspector
that comes around to inspect their work.

As bicycles here are considered as vehicles and get to use the roads
just like other vehicles do we don't have "bike lanes" and simply ride
on the side of the road.... which is swept and clean :-)


  #48  
Old August 12th 18, 04:10 AM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 144
Default Flat repair

On Sat, 11 Aug 2018 22:47:34 -0400, Frank Krygowski
wrote:

On 8/11/2018 10:07 PM, Andy wrote:

Most of my flats show up when I am at home where it's easy to fix.

I should care a spare.


Absolutely! A spare tube, plus a patch kit in case of a two-flat
disaster day. And whatever tools are necessary to make the change.

Should I get one of those mini pumps or is one of those CO2 rigs worth it?


I remember one club ride where several CO2 rigs failed or were wasted -
for example, by trying to fill a tube that still had a hole in it. The
victim eventually borrowed my full sized frame pump to get on the road
again.

So I'd prefer a pump over CO2. And I prefer a full sized frame pump over
a mini pump, since the typical mini pump requires hundreds of strokes to
inflate a tire.

But others disagree, of course. YMMV.


I don't believe I've ever pumped a tire with a fill length pump and
always wondered. Can one pump up 100 psi pressures with a full length
pump?
  #49  
Old August 12th 18, 04:21 AM posted to rec.bicycles.tech
John B. Slocomb
external usenet poster
 
Posts: 144
Default Flat repair

On Sat, 11 Aug 2018 19:07:54 -0700 (PDT), Andy
wrote:

On Saturday, August 11, 2018 at 8:14:14 PM UTC-5, David Scheidt wrote:
Andy wrote:
:On Friday, August 10, 2018 at 8:41:51 PM UTC-5, David Scheidt wrote:
: AMuzi wrote:
: :On 8/10/2018 5:36 PM, jbeattie wrote:
: : On Friday, August 10, 2018 at 12:33:29 PM UTC-7, Frank Krygowski wrote:
: : On 8/10/2018 3:09 PM, David Scheidt wrote:
: : Andy wrote:
:
: :-snip snip-
:
: :I'll keep patching if it has sentimental value or its some
: :weird size that I need.
: :
: : -- Jay Beattie.
: :
:
: :Huh.
: :I thought I was as maladjusted and psychologically damaged
: :as anyone on RBT, but I can't say I ever felt sentiment for
: :a tube. YMMV of course.
:
: I had a tube that was made in the month I was born. It had ~25
: patches in it. Its demise, at age 35 or so, was a tire that should
: have been replaced a few miles before it split down the middle of the
: tread.

:Were you born during the Depression?

The Ford Administration.

:I thought my father was frugal. :-)

There's no reason to toss a tube just because it's got a few holes in
it. These days, I discard tubes hwne the valves fail.

https://imgur.com/a/wKGLIvd



--
sig 40


With 25 patches, it's probably more puncture resistant that a new tube.

Most of my flats show up when I am at home where it's easy to fix.

I should care a spare.

Should I get one of those mini pumps or is one of those CO2 rigs worth it?

Andy


I have had a number of CO2 rigs and they are are certainly not all
created equally, and some barely work, right out of the box. If you
plan to use them I would suggest that you buy a couple of spare CO2
tubes and practice a bit. I had one, for example, that if you opened
the valve fully it would get so cold that ice would form. Hard to
inflate a tire with ice :-)

Some mini pumps are quite powerful. I have one that I can quite easily
inflate a tire to 100 psi, but, as Frank noted, they take a lot of
pumping to get here.
  #50  
Old August 12th 18, 06:06 AM posted to rec.bicycles.tech
David Scheidt
external usenet poster
 
Posts: 1,346
Default Flat repair

Frank Krygowski wrote:
:On 8/11/2018 8:04 PM, Andy wrote:
: On Friday, August 10, 2018 at 2:20:57 PM UTC-5, Frank Krygowski wrote:
: On 8/10/2018 9:02 AM, Andy wrote:
: On Friday, August 10, 2018 at 7:47:58 AM UTC-5, AMuzi wrote:
: On 8/10/2018 1:14 AM, Andy wrote:
: I had to repair a flat. Have some questions.
:
: Is it best to apply patch to a completly flat tube?
:
: I found a small copper wire in tire.
:
: Is there something to minimize what can puncture tire?
:
: Thanks
:
:
: Pathing covered in images 4 through 8 he
: http://www.yellowjersey.org/tubfix.html
:
: If you find a way to escape flat tires do write back.
:
: One way is to not ride. :-)
:
: One thing that helps is to ride away from the gutter. If you ride on the
: section of road that's routinely contacted by car tires, you'll find
: it's swept clean of most debris.
:
: Lots of glass shards, wire bits etc. get tossed out of that area toward
: the far right, where most cyclists like to ride.
:
: --
: - Frank Krygowski
:
: Interesting.
:
: We have frequent street sweepers, so the bike lane is usually pretty clean.

:That must be nice. In my area, the street sweepers arrive just twice per
:year. And in my area and in other towns I ride in, it's absolutely
:normal for the bike lane to have much more debris than the road surface.

Some of the routes I ride in are swept once a week outside of snow
season. The bike lanes or edges of traffic lanes are still full of
glass and debris, for the reasons you noted before.


--
sig 17
 




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