suggestions: frame pump

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is

the

Quoted message said:

best frame pump out there? I am using presta valves and running over

100

Quoted message said:

psi on my road tires. I don't want CO2. Suggestions appreciatd.

thanks, JC

I used to swear by my old Silca. It still works fine, but I've
switched to a Topeak Road Morph pump:
http://www.touringcyclist.com/gear/model_6474.html

It works fine: it's more like a little floor pump (complete with gauge)
and it's far less cumbersome to use than my old frame pump. 100 psi is
easy, too.

Recommendation (if you don't already do this): get a floor pump and use
it for checking and topping off tires at home. Reserve the frame pump
for emergency on-the-road use.

Jeff

ditto what jeff said.
"JOHN CORDELL" <[email hidden]> wrote in message
news:[email hidden]...

Quoted message said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is
the best frame pump out there? I am using presta valves and running
over 100 psi on my road tires. I don't want CO2. Suggestions
appreciatd. thanks, JC

Any of the full sized frame pumps from major brands seem to work well --
Blackburn, Zefal, Topeak, etc., as long as you stick to the high pressure "road"
models. When you get into the mini-pumps they start to get dicey.

Matt O.

On Mon, 21 Feb 2005 11:38:11 -0800, JOHN CORDELL <[email hidden]>

Quoted message said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

My Blackburn works great.

Ron

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

I've had Zefal HPX pumps on my road bikes for years and quite like
them, however I bought a Topeak RoadMorph for my touring bike and have
been pretty pleased with that also.

jeverett3<AT>earthlink<DOT>net http://home.earthlink.net/~jeverett3

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

I'll say Zefal hpx, but I'll also qualify it by saying that the plastic
curved tabs where the pump touches the frame can break off in use. This
doesn't make the pump fall off but it's a bit [censored] in a 20UKP product.

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is
the best frame pump out there? I am using presta valves and running
over 100 psi on my road tires. I don't want CO2. Suggestions
appreciatd. thanks, JC

I'll doubtless get flamed for this, but the long skinny Performance
"Hurricane" frame pump works surprisingly well and easily. Get one on sale
(like, $12.99? $9.99??), and it's downright cheap. (Like me.)

S o r n i said:

JOHN CORDELL wrote:

Quoted message said:

Quoted message said:

I finally broke my frame pump and am looking for a new one. What is
the best frame pump out there? I am using presta valves and running
over 100 psi on my road tires. I don't want CO2. Suggestions
appreciatd. thanks, JC

I'll doubtless get flamed for this, but the long skinny Performance
"Hurricane" frame pump works surprisingly well and easily. Get one
on sale (like, $12.99? $9.99??), and it's downright cheap. (Like
me.)

Why would you get flamed? If it works well, that's a great deal.

Matt O.

Bursting in with a side question (so top posting) : why do they only come as
CO2 and not just plain air ? CO2 seems to leak out at an astoundingly fast
rate, must cost more to segregate than just putting air into cylinders.

Why oh why CO2 ?

--
Sandy
Verneuil-sur-Seine FR

*******

La vie, c'est comme une bicyclette,
il faut avancer pour ne pas perdre l'équilibre.
-- Einstein, A.

"JOHN CORDELL" <[email hidden]> a écrit dans le message de :
news:[email hidden]...

Quoted message said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

Sandy said:

Bursting in with a side question (so top posting) : why do they only
come as CO2 and not just plain air ? CO2 seems to leak out at an
astoundingly fast rate, must cost more to segregate than just putting
air into cylinders.

Why oh why CO2 ?

Maybe because it has no water vapor to it? Under compression, the
moisture might become a factor? Just a guess. thanks to everyone for the
suggestions. JC

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is
the best frame pump out there? I am using presta valves and running
over 100 psi on my road tires. I don't want CO2. Suggestions
appreciatd. thanks, JC

Another vote for: Zefal HPX

~PB

Zog The Undeniable said:

I'll say Zefal hpx, but I'll also qualify it by saying that the plastic
curved tabs where the pump touches the frame can break off in use. This
doesn't make the pump fall off but it's a bit [censored] in a 20UKP product.

The plastic tabs are replaceable and the pump is guaranteed for life.

Sandy said:

Bursting in with a side question (so top posting) : why do they only
come as CO2 and not just plain air ? CO2 seems to leak out at an
astoundingly fast rate, must cost more to segregate than just putting
air into cylinders.

Why oh why CO2 ?

CO2 molecules are larger than N2, so it shouldn't leak out faster than
plain air. Compressed CO2 (at normal temperatures) takes a liquid form so
it's relatively dense at relatively low pressure -- in order to get the
same amount of air into the same size container, you have to pump the
pressure higher. That makes pumping CO2 into containers cheaper than
pumping in plain air, and it makes releasing pressure from a CO2 container
much safer. That's why it's possible to use a CO2 fire extinguisher with
one hand -- if you tried releasing pressure from a tank of plain air of
similar size with similar contents, it'd blow you backwards. That's also
the reason why paintball enthusiasts prefer to use compressed air: it
pushes those paintball pellets much farther than compressed CO2.

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

I bought several last year, and wound up liking the Blackburn best. It
is well made and the foldover handle is nice allowing it to be used much
like a floor pump. The Road master blaster from my LBS is good. The
Zefal HPX is OK, but I found it to be rather cheep -- of considerably
lower quality than my old Zefal HPS. I didn't try Topek, and the Silca
pumps I have are very old and will not pump to as high a pressure as the
modern ones.

--
Bob Wheeler --- http://www.bobwheeler.com/
ECHIP, Inc. ---
Randomness comes in bunches.

On Mon, 21 Feb 2005 15:11:37 -0500, "Matt O'Toole" <[email hidden]>

Quoted message said:

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is
the best frame pump out there? I am using presta valves and running
over 100 psi on my road tires. I don't want CO2. Suggestions
appreciatd. thanks, JC

Any of the full sized frame pumps from major brands seem to work well --
Blackburn, Zefal, Topeak, etc., as long as you stick to the high pressure "road"
models. When you get into the mini-pumps they start to get dicey.

I gave away the Topeak road morph and went back to a full size frame
pump (HpX in my case). The road morph was slightly easier to set up,
took forever to get up to 100 psi, pinched my fingers, and in general
was a hassle. I find it easier to top 75 psi with the HpX, so I
prefer the full size pump.

Pat

Email address works as is.

Robert Chung said:

Sandy said:

Bursting in with a side question (so top posting) : why do they only
come as CO2 and not just plain air ? CO2 seems to leak out at an
astoundingly fast rate, must cost more to segregate than just putting
air into cylinders.

Why oh why CO2 ?

CO2 molecules are larger than N2, so it shouldn't leak out faster than
plain air.

[snip]

Dear Robert,

It would seem that way, but it isn't.

The real explanation is the solubility of a particular gas
in rubber, not the size of its molecules.

The air we breathe is about 80% nitrogen, 20% oxygen, and
only 0.03% CO2.

Nitrogen seeps out through rubber slowly, ordinary air a bit
faster, oxygen much faster, and pure CO2 goes through rubber
like--

Er, much faster. Here's a link to the details:

http://groups.google.co.uk/groups?q=carl+nitrogen+oxygen&hl=en&lr=&group=rec.bicycles.tech&scoring=d&selm=52d1n09o24er1drgnakdem4j1eia9so258%404ax.com&rnum=4
or http://tinyurl.com/6qbg8

Carl Fogel

JOHN CORDELL said:

I finally broke my frame pump and am looking for a new one. What is the
best frame pump out there? I am using presta valves and running over 100
psi on my road tires. I don't want CO2. Suggestions appreciatd. thanks, JC

Zefal HPX, IMHO, is the most reliable and among the easiest
to pump to road pressures

http://www.yellowjersey.org/hpx.html

--
Andrew Muzi
www.yellowjersey.org
Open every day since 1 April, 1971

"Robert Chung" <[email hidden]> a écrit dans le message de :
news:[email hidden]...

Quoted message said:

Sandy said:

Bursting in with a side question (so top posting) : why do they only
come as CO2 and not just plain air ? CO2 seems to leak out at an
astoundingly fast rate, must cost more to segregate than just putting
air into cylinders.

Why oh why CO2 ?

CO2 molecules are larger than N2, so it shouldn't leak out faster than
plain air.

Having looked at Carl's references, I am willing to accept their
conclusions. My own are only from experience, knowing that you have to
replenish the tire relatively quickly, if it's full of CO2.

Quoted message said:

Compressed CO2 (at normal temperatures) takes a liquid form so
it's relatively dense at relatively low pressure -- in order to get the
same amount

Amount - what measure ? weight shouldn't matter - expanded volume in a tube
at 8 bars ?

Quoted message said:

of air into the same size container, you have to pump the
pressure higher. That makes pumping CO2 into containers cheaper than
pumping in plain air, and it makes releasing pressure from a CO2 container
much safer. That's why it's possible to use a CO2 fire extinguisher with
one hand -- if you tried releasing pressure from a tank of plain air of
similar size with similar contents, it'd blow you backwards.

I'm too sleepy to be sure I get this. I thought that if the objective were
to achieve a pressure equilibrium of around 8 bars after releasing the
compressed gas, the closed pressure of the cartridge would be the same.
What am I failing to grasp ? Is it the conversion to liquid when
pressurized in the cartridge that makes this work ?

Quoted message said:

That's also
the reason why paintball enthusiasts prefer to use compressed air: it
pushes those paintball pellets much farther than compressed CO2.

Does that mean that you *can* get air cartridges ?
--
Bonne route,

Sandy
Verneuil-sur-Seine FR

Quoted message said:

It would seem that way, but it isn't.

The real explanation is the solubility of a particular gas
in rubber, not the size of its molecules.

Ahh, you're right. I stand corrected. Thanks.