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Portable High pressure pump

Old 06-05-16, 07:07 AM
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whitla
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Portable High pressure pump

Hi all,

I'm looking for a pump to take on tour that can really move air. We have 2 tandem bikes that require 100-120psi and we will be taking them on planes so it would be great to have a small portable pump that can get that kind of pressure quickly.

Any suggestions on what to get??

Thanks in advance for any advice.
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Old 06-05-16, 07:14 AM
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Topeak works for me.
Get, Two one for each of you.

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Old 06-05-16, 07:22 AM
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Are those 2 different pumps??

Originally Posted by 10 Wheels View Post
Topeak works for me.
Get, Two one for each of you.

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Old 06-05-16, 07:29 AM
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Lezyne: Lezyne - Engineered Design - Products - Hand Pumps

BTW I have a Topeak, but replaced it with the Lezynes:
- Micro Floor Drive for the touring bike, (which has a large trunk bag).
- Road Drive for the road bikes.

The Topeak now lives under the saddle of the motorcycle.
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Old 06-05-16, 07:32 AM
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Note: long one has a gage in the hose.. it because of stroke length will move more air.

as such a longer frame fit pump will be better, but these are little floor pumps , you push against the ground.

a long tube of air compressed down to a small short one is a pressure increase.

Last edited by fietsbob; 06-05-16 at 11:50 AM.
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Old 06-05-16, 07:39 AM
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Are you deflating the tires to fly? It may not be necessary. The pressure altitude in commercial jets is maintained at 8000'. At that pressure altitude, atmospheric pressure is ~4 psi less than at sea level. If you inflate your tires to 100 psi at sea level, they'd measure 104 psi at 8000'. The 4 psi difference shouldn't cause any problems, but letting just a bit of air out will easily compensate.

You might note that no one deflates and reinflates the tires of wheelchairs or baby strollers with pneumatic tires when they go on and off the plane.

Of course you still need a pump (or locally sourced CO2 cartridges) to deal with flats. You just won't need to pump up all four tires from scratch, though even that isn't that onerous. I've timed myself inflating a road tire with a small mini pump and though it seemed like a lot longer, it only took around a minute to get to 90 psi or so with no special effort to hurry or anything.

Last edited by Looigi; 06-05-16 at 07:46 AM.
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Old 06-05-16, 09:26 AM
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Originally Posted by Looigi View Post
Are you deflating the tires to fly? It may not be necessary. The pressure altitude in commercial jets is maintained at 8000'. At that pressure altitude, atmospheric pressure is ~4 psi less than at sea level. If you inflate your tires to 100 psi at sea level, they'd measure 104 psi at 8000'. The 4 psi difference shouldn't cause any problems, but letting just a bit of air out will easily compensate.

You might note that no one deflates and reinflates the tires of wheelchairs or baby strollers with pneumatic tires when they go on and off the plane.
Yes, even going into deep space vacuum conditions will only add 14.7psi.
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Old 06-05-16, 09:35 AM
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Originally Posted by 10 Wheels View Post
Topeak works for me.
Get, Two one for each of you.

+1 I like my Road Morph G; the hose cuts down stress on the valve stems and you can easily change the head from Schrader to Presta.
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Old 06-05-16, 09:55 AM
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To achieve high pressure without requiring unduly high effort requires a narrower pump tube. That means if you want to inflate with fewer strokes you need the longest tube possible. So look for a long, well-rated/reviewed pump. Lezyne pumps generally have good reviews, I favor them and they are one of the few that come in different lengths. Lezyne - Engineered Design - Products - Hand Pumps

Last edited by cny-bikeman; 06-05-16 at 10:08 AM.
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Old 06-05-16, 10:22 AM
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Originally Posted by Looigi View Post
Are you deflating the tires to fly? It may not be necessary. The pressure altitude in commercial jets is maintained at 8000'. At that pressure altitude, atmospheric pressure is ~4 psi less than at sea level. If you inflate your tires to 100 psi at sea level, they'd measure 104 psi at 8000'. The 4 psi difference shouldn't cause any problems, but letting just a bit of air out will easily compensate.

You might note that no one deflates and reinflates the tires of wheelchairs or baby strollers with pneumatic tires when they go on and off the plane.

Of course you still need a pump (or locally sourced CO2 cartridges) to deal with flats. You just won't need to pump up all four tires from scratch, though even that isn't that onerous. I've timed myself inflating a road tire with a small mini pump and though it seemed like a lot longer, it only took around a minute to get to 90 psi or so with no special effort to hurry or anything.
The back tires we be deflated. This is mostly as it helps them fit into the box we have and allows us to keep our back racks mounted. I guess we won't deflate the front tires much at all.

Thanks that is great info.
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Old 06-05-16, 11:37 AM
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Originally Posted by whitla View Post
The back tires we be deflated. This is mostly as it helps them fit into the box we have and allows us to keep our back racks mounted. I guess we won't deflate the front tires much at all.
I would stongly advise to keep at least 40lbs pressure in the tires, as it's quite possible that the box could be dropped in transit, potentially causing wheel damage. Put some extra cardboard on the top if necessary to close it, or remove the bottom rack screws so that you can rotate the rack down out of the way.
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Old 06-05-16, 01:18 PM
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Ok thanks. Good advice!

Originally Posted by cny-bikeman View Post
I would stongly advise to keep at least 40lbs pressure in the tires, as it's quite possible that the box could be dropped in transit, potentially causing wheel damage. Put some extra cardboard on the top if necessary to close it, or remove the bottom rack screws so that you can rotate the rack down out of the way.
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Old 06-05-16, 04:39 PM
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Originally Posted by whitla View Post
it would be great to have a small portable pump that can get that kind of pressure quickly.
What you are asking for is physically impossible. You can have a small pump OR you can have one that fills the tire quickly but not both at the same time.
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Old 06-05-16, 05:27 PM
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But some make it much easier than others and less effort. Having one that has a hose and can be put on the ground for instance is easier to fill a tire with for me.

I used to have a blackburn pump that did this well. The pump I have now does not.

Originally Posted by HillRider View Post
What you are asking for is physically impossible. You can have a small pump OR you can have one that fills the tire quickly but not both at the same time.
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Old 06-05-16, 06:41 PM
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I used a friend's Lezyne pump, and it was impressive.

The Zefal HPX, unchanged for years, is still a good choice. It takes some work to get to 100 or 120, but it's possible. I used to use one of these on the road and at home. Now I'm a bit smarter and learned that floor pumps are worth having, but it speaks well of the Zefal.
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Old 06-05-16, 07:27 PM
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Originally Posted by whitla View Post
But some make it much easier than others and less effort. Having one that has a hose and can be put on the ground for instance is easier to fill a tire with for me.
My point is that the ones that make it easy also require a lot of strokes to fill a tire to acceptable pressure. Some of the mini-pumps take 250-300 strokes to fill a 700-23 to 100 psi. So you can have hard and fast or easy and slow. And, yes, a hose certainly makes manipulating the pump a lot easier and far less prone to breaking off a Presta valve stem.

The Topeak Road Morph is about half way between a mini-pump and a floor pump. It's too heavy, big and bulky to be a real mini-pump but too small to be a real floor pump. It is a decent compromise.
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Old 06-05-16, 07:32 PM
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Originally Posted by 10 Wheels View Post
Topeak works for me.
Get, Two one for each of you.

That's a mini-Morph at the bottom. Nice and compact, but I counted about 200 strokes to get to 85-90 psi. By that point, I was really leaning into the pump , using body weight to press down. That's fine for getting home after a flat, not as useful for refilling tires regularly.

I've been on rides with other riders that have the classic long frame pumps. Those work great, and are fast.

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Old 06-05-16, 08:19 PM
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Originally Posted by noglider View Post
I used a friend's Lezyne pump, and it was impressive.
But not, it seems, as impressive as the Quicker Pro. 1, 2

OP - Don't know how your team handles this sort of thing but FWIW, the Topeak Road Morph G is the only pump my wife (stoker) can get the tandem's tires pumped up to pressure with.
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Old 06-06-16, 12:56 PM
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Originally Posted by whitla View Post
The back tires we be deflated. This is mostly as it helps them fit into the box we have and allows us to keep our back racks mounted. I guess we won't deflate the front tires much at all.
You could deflate rear tires to get them into the shipping case, and then add some air back to snug the fit, minimize rattling around.
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Old 06-06-16, 01:27 PM
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Originally Posted by RubeRad View Post
You could deflate rear tires to get them into the shipping case, and then add some air back to snug the fit, minimize rattling around.
Nice!
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