Slime Presta tubes

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

Quoted message said:

I tried pumping up a Presta valve Slime tube wheelset and had no
success.
These are factory Slime Presta tubes.

I pumped these up a year and a half ago, now nogo.
Wondering if perhaps the Slime has clogged the Presta.
Anyone know if this becomes an issue with Presta tubes?

If that is what has happened, is there a remedy such as a chemical or
continued pressure at the valve or might that create other problems?
meb

Sorry to hear about your Slime Presta tubes....
I'm sure you'll find an expert here on this subject.
Those nasty Goat-heads. ;-)
-tom

On Tue, 4 Dec 2007 20:44:59 +1100, meb

may have said:

I tried pumping up a Presta valve Slime tube wheelset and had no
success.
These are factory Slime Presta tubes.

I pumped these up a year and a half ago, now nogo.
Wondering if perhaps the Slime has clogged the Presta.
Anyone know if this becomes an issue with Presta tubes?

If that is what has happened, is there a remedy such as a chemical or
continued pressure at the valve or might that create other problems?

Presumably, you physically pushed the valves open before trying to
pump up the tire, correct?

--
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.

meb said:

I tried pumping up a Presta valve Slime tube wheelset and had no
success.
These are factory Slime Presta tubes.

I pumped these up a year and a half ago, now nogo.
Wondering if perhaps the Slime has clogged the Presta.
Anyone know if this becomes an issue with Presta tubes?

If that is what has happened, is there a remedy such as a chemical or
continued pressure at the valve or might that create other problems?

Dear Meb,

A stuck Presta valve isn't unusual with Slime tubes. Usually you just
push down with your thumb and it breaks free.

If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

There are two tiny flats where the valve cap threads on. You can see
one flat on the silver section near the normal knurled brass nut.
Everything unscrews in the same direction--valve cap, Presta nut, and
the whole assembly.

The guts of the valve may be gummed or clogged with little white
fibers. You can pull the fibers out with your fingernails, water will
dissolve the Slime, and a quick huff-and-puff will blow any Slime out
of the valve stem and back into the tube.

Cheers,

Carl Fogel

Quoted message said:

A stuck Presta valve isn't unusual with Slime tubes. Usually you just
push down with your thumb and it breaks free.

If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Not all Presta valves come apart this way, and trying this on some of
them will distort the valve body enough that the stem will be
deflected, preventing the valve from being able to seal thereafter.
(I discovered this experimentally by ruining one of my own, and
confirmed it on a sample of junked tubes from a shop's trash bin.)

--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

Werehatrack said:

Quoted message said:

A stuck Presta valve isn't unusual with Slime tubes. Usually you just
push down with your thumb and it breaks free.

If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Not all Presta valves come apart this way, and trying this on some of
them will distort the valve body enough that the stem will be
deflected, preventing the valve from being able to seal thereafter.
(I discovered this experimentally by ruining one of my own, and
confirmed it on a sample of junked tubes from a shop's trash bin.)

Dear Werehatrack,

No, most normal Presta valves don't unscrew.

But all Slime brand tubes do indeed come apart that way, and the
original poster said: "These are factory Slime Presta tubes."

When you look at a Slime brand tube's Presta valve, it's easy to see
that the assembly unscrews--the valve stem is dark brass, while the
assembly is bright silver, with tiny flats on the threads to grab with
pliers and unscrew.

That's how they pump the Slime mixture in at the factory, through the
wide-open barrel of the empty valve stem. The valve is screwed in
afterward. You can't pump the Slime with its chopped-up white fibers
through the tiny opening of an ordinary Presta valve.

Cheers,

Carl Fogel

Where's the hatrack said:

Quoted message said:

A stuck Presta valve isn't unusual with Slime tubes. Usually you
just push down with your thumb and it breaks free.

Quoted message said:

Quoted message said:

If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Quoted message said:

Not all Presta valves come apart this way, and trying this on some
of them will distort the valve body enough that the stem will be
deflected, preventing the valve from being able to seal thereafter.
(I discovered this experimentally by ruining one of my own, and
confirmed it on a sample of junked tubes from a shop's trash bin.)

If it's full of slime, it most likely has a removable valve core.
How do you put slime in a Presta valved tube?

Jobst Brandt

On 04 Dec 2007 20:02:53 GMT, [email hidden] may have

Quoted message said:

Where's the hatrack said:

Quoted message said:

A stuck Presta valve isn't unusual with Slime tubes. Usually you
just push down with your thumb and it breaks free.

Quoted message said:

Quoted message said:

If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Quoted message said:

Not all Presta valves come apart this way, and trying this on some
of them will distort the valve body enough that the stem will be
deflected, preventing the valve from being able to seal thereafter.
(I discovered this experimentally by ruining one of my own, and
confirmed it on a sample of junked tubes from a shop's trash bin.)

If it's full of slime, it most likely has a removable valve core.

The only slimed Prestas of my direct experience unscrewed at the base,
not at the top. They had extra-long stems. The valve on those was
not separable from the body. I don't know if they were "factory
Slimed", but the goo inside was the color and consistency of the
genuine Slime product. The results I obtained from them are part of
the reason that I have not bought any subsequently.

Quoted message said:

How do you put slime in a Presta valved tube?

Well, since you ask, I don't.

--
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.

this is OT and i haven't had flats (knock on wood)
since i switched to these and Mich RR2Pro in the rear,
but i got to ask:
how much mess there is to cleanup when these go off?
is wheel/tire easy to clean off the slime? does slime harden
when exposed to air?

Quoted message said:

this is OT and i haven't had flats (knock on wood)
since i switched to these and Mich RR2Pro in the rear,
but i got to ask:
how much mess there is to cleanup when these go off?
is wheel/tire easy to clean off the slime? does slime harden
when exposed to air?

In a full blowout, things get a bit messy, but I've been able to clean up
with some shop towels or wet wipes without much difficulty.

The bigger worry in such a situation is that the freed Slime acts as a
spectacular lubricant betwixt the tire and rim, a place one generally does
not wish to have lubricant. The tire will squirm rather badly, which can
result in a crash if you aren't able to slow down and get some stability in
time. This has only happened to me once, but it's worth keeping in mind.

--

Kristian Zoerhoff
[email hidden]

Where's the hatrack said:

Quoted message said:

Quoted message said:

> A stuck Presta valve isn't unusual with Slime tubes. Usually you
> just push down with your thumb and it breaks free.

Quoted message said:

Quoted message said:

Quoted message said:

> If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Quoted message said:

Quoted message said:

Quoted message said:

Not all Presta valves come apart this way, and trying this on some
of them will distort the valve body enough that the stem will be
deflected, preventing the valve from being able to seal
thereafter. (I discovered this experimentally by ruining one of
my own, and confirmed it on a sample of junked tubes from a shop's
trash bin.)

Quoted message said:

Quoted message said:

If it's full of slime, it most likely has a removable valve core.

Quoted message said:

The only slimed Prestas of my direct experience unscrewed at the
base, not at the top. They had extra-long stems. The valve on
those was not separable from the body. I don't know if they were
"factory Slimed", but the goo inside was the color and consistency
of the genuine Slime product. The results I obtained from them are
part of the reason that I have not bought any subsequently.

I've never seen such a valve stem. Would you please post a picture or
give a link to a web site that shows one?

Quoted message said:

Quoted message said:

How do you put slime in a Presta valved tube?

Quoted message said:

Well, since you ask, I don't.

So I should have asked, how one puts slime in a Presta valved tube?

Jobst Brandt

Quoted message said:

this is OT and i haven't had flats (knock on wood)
since i switched to these and Mich RR2Pro in the rear,
but i got to ask:
how much mess there is to cleanup when these go off?
is wheel/tire easy to clean off the slime? does slime harden
when exposed to air?

Dear S,

Short answer, don't worry, the stuff wipes off with a finger, even
when dried.

The faintly tacky green fluid is full of chopped-up white fibers.

Think of pouring a gallon of molasses and noodles into a sink.

With a pinhole from a goathead thorn, my Slime tube may show nothing
but a tiny wisp of white fiber sticking out of the tread. The drop or
two of green fluid wiped off on the pavement, but there's a clog of
fiber and faintly gummy green stuff jammed in the tiny hole in the
tube and tire.

Or the tire may leak a single drop of vivid green Slime. The tire is
still holding air, but that drop of green makes it hard to pretend
that I just need to pump the tire up.

Or the tire can go whoosh-whoosh-whoosh and spray the red frame with
an artistic splatter of green Jackson-Pollock-style imagery. Sometimes
it will seal and hold all the way home, sometimes it will seal and
then fail after a mile, and sometimes it's flat before I can stop.

If a tire creeps off an overheated rim just before you reach the
Presta valve . . .

http://i18.tinypic.com/4t9hswg.jpg

That splat came out of this hole . . .

http://i19.tinypic.com/53r4dp0.jpg

But even that mess wiped off with one hand, followed by a quick swipe
on the roadside grass.

Here's a tire that sat overnight after it almost won an argument with
a staple:

http://i9.tinypic.com/5xsbmg1.jpg

You cansee some of the staple in the middle green spot in the center
of the tread.

Anyway, the Slime wipes off with a finger. If you leave it to dry on
your frame, a damp paper towel wipes it off.

It doesn't eat paint, rot inner tubes, turn your skin red, or anything
else terrible.

In fact, the stuff is technically edible, being mostly a substance
often used in commercial ice cream:

http://groups.google.com/group/rec.bicycles.tech/msg/c561833dc8d35cec

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

Cheers,

Carl Fogel

Quoted message said:

Where's the hatrack said:

Quoted message said:

>> A stuck Presta valve isn't unusual with Slime tubes. Usually you
>> just push down with your thumb and it breaks free.

Quoted message said:

Quoted message said:

>> If that doesn't work, unscrew the valve assembly with pliers:

http://i15.tinypic.com/8g8ps2b.jpg

Quoted message said:

Quoted message said:

> Not all Presta valves come apart this way, and trying this on some
> of them will distort the valve body enough that the stem will be
> deflected, preventing the valve from being able to seal
> thereafter. (I discovered this experimentally by ruining one of
> my own, and confirmed it on a sample of junked tubes from a shop's
> trash bin.)

Quoted message said:

Quoted message said:

If it's full of slime, it most likely has a removable valve core.

Quoted message said:

The only slimed Prestas of my direct experience unscrewed at the
base, not at the top. They had extra-long stems. The valve on
those was not separable from the body. I don't know if they were
"factory Slimed", but the goo inside was the color and consistency
of the genuine Slime product. The results I obtained from them are
part of the reason that I have not bought any subsequently.

I've never seen such a valve stem. Would you please post a picture or
give a link to a web site that shows one?

Quoted message said:

Quoted message said:

How do you put slime in a Presta valved tube?

Quoted message said:

Well, since you ask, I don't.

So I should have asked, how one puts slime in a Presta valved tube?

Jobst Brandt

Dear Jobst,

Since you ask . . .

I knew a fellow who was familiar with Slime in bottles, the kind sold
in hardware stores.

He didn't know that pre-filled, ready-to-use Slime Presta-valve tubes
are available.

So he made a small hole in his ordinary tube, squirted the Slime in,
patched the tube, and did fine. He switched to factory tubes as soon
as he found out about them.

Like you, I can't imagine forcing a few ounces of green Slime full of
chopped-up fibers through a Presta valve stem that still has a Presta
valve rattling around inside it. The stuff just won't go through such
a tiny opening.

In fact, part of the fun of using Slime tubes is dealing with clogged
valves. I put a pump on the plugged valve, blow the stuff back into
the tube with a stroke or two, and deflate it more carefully.

If I can't blow a clogged Presta valve open with the pump, I unscrew
the valve assembly, pick the fibers out of it, blow it clean with lung
power, put it back together, and pump the tube up.

Cheers,

Carl Fogel

On Dec 4, 4:01 pm, Kristian M Zoerhoff <[email hidden]>

Quoted message said:

The bigger worry in such a situation is that the freed Slime acts as a
spectacular lubricant betwixt the tire and rim, a place one generally does
not wish to have lubricant. The tire will squirm rather badly, which can
result in a crash if you aren't able to slow down and get some stability in
time. This has only happened to me once, but it's worth keeping in mind.

thanks. as i get more confident in the capability of Road Race2 Pro
i lean more and more, so i guess i'll skip slimy tubes in front on the
next change.
what tubes resist punctures well but don't have slime in them?

Carl Fogel said:

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

i had a lot of flats before the last tire swap. looks like you need to
start searching for a tire of your dreams 🙂

On Tue, 04 Dec 2007 17:48:56 -0700, [email hidden] may have

Quoted message said:

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

Ah, so at last the truth is out; what you really need is a better
place to ride...

--
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.

On Tue, 4 Dec 2007 17:38:17 -0800 (PST), [email hidden] may have

Quoted message said:

what tubes resist punctures well but don't have slime in them?

In general: Thick ones, and tubes inside tires equipped with a tire
liner, and tubes inside tires that are designed to be hard to
puncture. These alternatives all increase the rolling resistance to
some degree, however. I can't tell you whether the increase is enough
to make a difference that's important to you.

Among other approaches, nondeflatable tube substitutes and tires have
their adherents and their detractors as well. I am among the latter;
I can't stand the things.

Quoted message said:

Carl Fogel said:

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

i had a lot of flats before the last tire swap. looks like you need to
start searching for a tire of your dreams 🙂

--
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.

Werehatrack said:

On Tue, 04 Dec 2007 17:48:56 -0700, [email hidden] may have

Quoted message said:

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

Ah, so at last the truth is out; what you really need is a better
place to ride...

Dear Werehatrack,

Sorry, I should have written " . . . hard to recommend it to unlucky
people who don't ride where I do."

Speaking of unlucky, I didn't have my camera out when a bald eagle
decided to fly up past me this afternoon, looking as picturesque as an
ad for the Post Office.

It didn't even have the grace to fly _away_ from me. The damn thing
flapped past about thirty feet overhead while I was desperately trying
to get the camera out and take a picture.

So there I was, camera out, lens snout extended, power turned on, and
finger poised to take a picture as the wretched bird disappeared over
the next ridge, hundreds of yards away.

I just stood there, muttering, since it's hard to get close to the
eagles, who are shy and like to perch on dead cottonwoods so far away
that a telephoto lens is needed.

There were no other eagles visible in the trees in the gully below, so
I put my camera back in its case and put the case back in my waist-bag
and was about to ride off when . . .

A hawk that had been hiding down in the same gully screamed and began
fighting its way up toward me into the brisk chinook that let me ride
in my shorts at 70F.

I fumbled the camera out again as the stupid hawk did a figure-eight
around me, but by the time I pushed the button, the hawk had swooped
away for this ridiculous, near-invisible, off-level picture:

http://i19.tinypic.com/7wyjrra.jpg

Can't see the hawk? Here's the detail from the center of the picture:

http://i19.tinypic.com/6y5ozg2.jpg

But as soon as I lowered the camera and put it away, the hawk swooped
back again and hung around long enough for a slightly better picture:

http://i4.tinypic.com/7x3kjuv.jpg

I was so annoyed by the pair of elusive birds that I almost didn't
stop to take a picture of these two bathing beauties:

http://i9.tinypic.com/85n8l7o.jpg

Hi, girls! That discarded tire on the shore line doesn't really help
the photo. Hmmm . . . maybe you're right, and I need to find a better
place to ride?

Cheers,

Carl Fogel

Quoted message said:

Kristian M Zoerhoff said:

The bigger worry in such a situation is that the freed Slime acts as a
spectacular lubricant betwixt the tire and rim, a place one generally does
not wish to have lubricant. The tire will squirm rather badly, which can
result in a crash if you aren't able to slow down and get some stability in
time. This has only happened to me once, but it's worth keeping in mind.

Quoted message said:

thanks. as i get more confident in the capability of Road Race2 Pro
i lean more and more, so i guess i'll skip slimy tubes in front on the
next change.
what tubes resist punctures well but don't have slime in them?

Quoted message said:

Carl Fogel said:

Slime won't seal large punctures, but it can often plug the goathead
thorn pinholes that I get. My impression is that most posters don't
get nearly as many flats as I do (50 so far this year), so it's hard
to recommend it to people who don't ride where I do.

Quoted message said:

i had a lot of flats before the last tire swap. looks like you need to
start searching for a tire of your dreams 🙂

Quoted message said:

what tubes resist punctures well but don't have slime in them?

For sizes appropriate to your Michelins, tubes are 'of a group' in that
regard. Double-thick ("TR"😉 tubes seem not to be made in those sizes. As
Chalo advised recently, matching the tube width is a help ( i.e., avoid
a 700-18 tube in a 700-25 tire) and brands do vary quite a bit by width
within one nominal size.

If you ride in goathead country, I have no snappy ideas. For
goathead-less riding, something like 3-5 flats a year from daily riding
is pretty much the normal baseline experience.
--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

On Tue, 04 Dec 2007 20:48:27 -0600, A Muzi <[email hidden]>

Quoted message said:

Quoted message said:

thanks. as i get more confident in the capability of Road Race2 Pro

[snip]

Quoted message said:

For sizes appropriate to your Michelins, tubes are 'of a group' in that
regard. Double-thick ("TR"😉 tubes seem not to be made in those sizes.

Dear Andrew,

Depending on how narrow the Michelin tire is, these Kenda
thorn-resistant tubes might fit, being allegedly for 700x20~23c:

http://www.blueskycycling.com/product3476_53_-Kenda-Thorn-Resistant-Tube.htm

How much thicker tubes help is another matter. Generally, they are
thought to help with pinholes from thorns, but not much worse.

Most riders suffer flats so rarely that random variation practically
guarantees apparent improvement if they try one or two different
remedies.

I didn't have a single flat tire from July 29th to September 4th, a
38-ride streak during the height of goathead season that DiMaggio
would have been proud of.

When discussing my feat with friends, I modestly attributed my
flat-free August to my keen-eyed alertness and fantastic reflexes.

They suspected--but couldn't prove--that I never dodged a single
goathead.

Ugly rumors of drugs were voiced, but I did it on nothing but
chocolate doughnuts and Coca-Cola.

Now all I need is a good explanation for the 18 flats in the next
three months.

Cheers,

Carl Fogel

Quoted message said:

I've never seen such a valve stem. Would you please post a picture or
give a link to a web site that shows one?

I don't have any way of posting a picture, however I have some in the
parts bin. They came in long and short varieties and have been around
for at least 20 years that I have knowledge of and probably much
longer. The base of the valve is flared outward making a wide base. It
passes through a valve sized hole via stretching the tube. A washer is
passed over the valve, and a thin nut is tightened, thus squishing the
tube between two flat surfaces (actually the flare continued past a 90
degree angle creating a restrained less squished volume between the
two surfaces). Never leaks!

I believe these valves were also sold separate from tubes, at any rate
I've seen a couple of bike shops with them - perhaps harvesting from
old tubes. I have some recollection that some 406 Air B tubes I bought
had them installed. And I've swapped valve lengths on tubes but I
don't remember the brand.