Getting maximum PSI from frame pump

adding phil wood waterproof green silicone bearing grease to the
cylinder boosts attainabull pressewer

On 6 Sep 2005 09:28:29 -0700, "Koons" <[email hidden]>

Quoted message said:

I use a Specialized Air Force I (now there's a bold name) full-sized
hand pump, which claims 140 PSI capacity. After about 75 PSI, filling
my tire is somewhat like a weightlifting exercise. Are there frame
pumps out there that for whatever mechanical reason make the higher
pressures easier to attain or is a matter of the person's strength?

Howdy,

Yup...

The narrower the cylinder of the pump the higher will be the
pressure for a given amount of force applied, but it will
take more strokes to bring the tire up to your chosen
pressure.

All the best,
--
Kenneth

If you email... Please remove the "SPAMLESS."

In article <[email hidden]>,

Koons said:

I use a Specialized Air Force I (now there's a bold name) full-sized
hand pump, which claims 140 PSI capacity. After about 75 PSI, filling
my tire is somewhat like a weightlifting exercise. Are there frame
pumps out there that for whatever mechanical reason make the higher
pressures easier to attain or is a matter of the person's strength?

Topeak Road Morph reaches 120psi pretty easily. However, the pump is
heavy and bulky.

Quoted message said:

Topeak Road Morph reaches 120psi pretty easily.

the road morph i'm blessed with goes to 65( on a good day) and then
flattens out...
However, the pump is light and compact

<[email hidden]> wrote: (clip) attainabull pressewer
^^^^^^^^^^^^^^^^^
I want some of that.

I'm not familiar with that pump so I won't comment on whether or not
it's your problem.

However, I've used a Zefal frame pump for years, and have found a neat
trick that allows me to reach 120 - 125 psi pretty easily.

You need to find a solid object that you can rest the end of the pump
head against, such as a curb or fence post, or whatever.

Rather than holding the wheel in the air and basically creating as much
force as you can while pumping w/ one hand and holding with the other,
you are pushing against a solid object. You achieve two goals: 1) you
can push harder against the solid object than you can against your
opposing hand, and 2) you don't run the risk of breaking the valve stem
off while pumping.

Just put your pump on the valve stem, lay the wheel down so that the
end of the pump head rests on the edge of a curb, and pump away. Use
your free hand to stabilize things. You'll get so much more pressure
this way, you'll find that the pump gets almost too hot to hold.

-----BEGIN PGP SIGNED MESSAGE-----

In article <[email hidden]>,

Quoted message said:

Quoted message said:

Topeak Road Morph reaches 120psi pretty easily.

the road morph i'm blessed with goes to 65( on a good day) and then
flattens out...
However, the pump is light and compact

_ Your pump is broken somehow. Mine goes to 100+ psi with only
moderate effort. Not as nice as real floor pump, but as close
as I've found in that size.

_ Booker C. Bense

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Koons said:

I use a Specialized Air Force I (now there's a bold name) full-sized
hand pump, which claims 140 PSI capacity. After about 75 PSI, filling
my tire is somewhat like a weightlifting exercise. Are there frame
pumps out there that for whatever mechanical reason make the higher
pressures easier to attain

The pump you want is that formerly known as the Zefal hpX, now called
something else by the marketroids, but the LBS will know what you mean.
It pumps well for three reasons:

1) it's not too large a diameter, so the force needed to compress the
air is small

2) the frame-fitting spring handle can be locked out for pumping, so you
don't waste effort compressing the spring

3) It has a good thumblock for the valve.

FWIW the claimed capacity is 160psi and I believe them.

i wuz wondering- the road morph morphs into a garlic squeezer as
pressure aproaches 60 pounds for a conti tt asking for 70 pounds-
is this diminishing returns factor common to all pumps?

Booker C. Bense said:

-----BEGIN PGP SIGNED MESSAGE-----

I use a topeak morph and regularly pump the tires up to 120 psi. Nice
pump, nice design. I highly recommend it.

EJ

Quoted message said:

Quoted message said:

In article <[email hidden]>,

Quoted message said:

Quoted message said:

Topeak Road Morph reaches 120psi pretty easily.

the road morph i'm blessed with goes to 65( on a good day) and then
flattens out...
However, the pump is light and compact

_ Your pump is broken somehow. Mine goes to 100+ psi with only
moderate effort. Not as nice as real floor pump, but as close
as I've found in that size.

_ Booker C. Bense

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QkB0v/vsIQL9ooLRx5FVyTeF+Czq+A1rbWWWT8hH1qu/7AJ3PJ71u3yKiP5KWfwJ
1e570I0RAW4=
=lbcp
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Koons said:

I use a Specialized Air Force I (now there's a bold name) full-sized
hand pump, which claims 140 PSI capacity. After about 75 PSI, filling
my tire is somewhat like a weightlifting exercise. Are there frame
pumps out there that for whatever mechanical reason make the higher
pressures easier to attain or is a matter of the person's strength?

I find that dismounting the wheel, supporting the end of the pump on a
rock (or whatever is handy), and using the pump as a floor pump makes
the process of achieving high pressure much easier.

In general, the smaller the piston of the pump, the easier it is to
pump high pressures from it...but the longer it takes to fill the
tire.
--
Typoes are a feature, not a bug.
Some gardening required to reply via email.
Words processed in a facility that contains nuts.

Leo Lichtman said:

<[email hidden]> wrote: (clip) attainabull pressewer
^^^^^^^^^^^^^^^^^
I want some of that.

They're pumping a millennial supply of it into Lake Ponchartrain at
the moment.

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

So that is what that guy was doing on the news today. He was scooping a
bottle of lube out of the lake for his pump. Cool.

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

Quoted message said:

Leo Lichtman said:

<[email hidden]> wrote: (clip) attainabull pressewer
^^^^^^^^^^^^^^^^^
I want some of that.

They're pumping a millennial supply of it into Lake Ponchartrain at
the moment.

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

hmm. that's enlightening. 120 from the morph. what i experience, and
i'm pleased with the morph-as a road going pump-the effect on
approaching 60 pounds, is the pressure increase for each stroke
diminishes and then going up to the 70 pound level is really hard
pumping

In article <[email hidden]>,

Quoted message said:

hmm. that's enlightening. 120 from the morph. what i experience, and
i'm pleased with the morph-as a road going pump-the effect on
approaching 60 pounds, is the pressure increase for each stroke
diminishes and then going up to the 70 pound level is really hard
pumping

Which morph are you using? Topeak has different road morph
and mountain morph pumps, maybe others.

Quoted message said:

Which morph are you using?

a road morph with gauge at hose end with a fold out base
well cared for and lubed but used for 4-5 years as the only pump:
400-600 pumps??
i bought a woolmort $10 auto floor foot pump to inflate HD touring TT's
up to 80 pounds and it gives me a huge infinite orgasm every . . .

<[email hidden]> wrote: (clip) and it gives me a huge infinite orgasm
every . . .
^^^^^^^^^^^^^^^^
Sometimes I wonder whether you are serious. BTW, "huge infinite" is sort of
redundant, isn't it?

Leo Lichtman said:

<[email hidden]> wrote: (clip) and it gives me a huge infinite orgasm
every . . .
^^^^^^^^^^^^^^^^
Sometimes I wonder whether you are serious. BTW, "huge infinite" is sort of
redundant, isn't it?

Sure, but so is "tiny infinite". Might be more applicable to Gene's
command of the English language.

--
Ted Bennett

no tis not: nalagous to getting 75 out of 60 pump. one need advance the
idea with creative language such as expletive deletyddeleytd*&^%&^%
goes beyond the 3 dim relevant to the 4/5 understanding at wave height
for example-what if yawl went to co2. how many co2 yawl gonna carry? or
get a new pump and find it goes to 58
pass the bongos