Great dual action pump, seals to tire valve fast, easily and effectively
925663
The pump works great. Before buying this one,  I tried a different mini pump which had a quick release lever to attach to the valve,  but that pump did not get a good seal to the valve so I was unable to use that other pump to air up my tire. I returned it and bought this one instead. The head of this pump screws directly onto the valve so you get a tight seal every time and little or no air is wasted attaching and detaching the pump from the valve. Got my tires up to pressure no problem in a very short amount of time. Great product and also it's dual action so you get air in on both the up and down movements of the pump. I highly recommend it.
**** update... after using it a few times, it suddenly stopped working. I pumped many times, but the tire pressure did not increase at all. It felt loose and then, the handle of the pump detached and came right off in my hand. I looked at it and noticed it could be screwed back together by opening the pump all the way, and screwing the metal shaft back into the head of the pump. After tightening it up, the pump worked great again. So, if you notice it feels loose and you're not getting the tire  pressure to increase easily, open the pump and tighten the metal shaft and you will get pressure again. When working correctly,  after aprox 100 strokes which takes less than 1 minute, the PSI increases about 15 psi Great pump!
1166788
This has been great! Sure, is a cheap gauge so it's not dead-on accurate but is close enough to help me fill up my tires. The thing is under $20, you can't have everything. Main complaint I saw was a lack of instructions. It came with plenty for me but switching between regular and presta (like my bike) is EXACTLY like any other pump that does both so just Google it.  Best thing is that you can pump against the ground instead of against your hand and the tire so no pulling and pushing on your valve. The piece of metal that folds out is perfect to step on to hold it still while you fill your tires and extending hose is plenty long enough so you aren't right up against your bike. Nice long movement makes filling up to higher pressures very easy. Mounts easily using the water bottle screws or comes with plastic zip ties to help mount elsewhere.
289143
Great pump, pretty quiet, too. Fills my tire very quickly. I would definitely recommend this to anyone who needs it.
2616457
Very good pump. I bought to pump up tires on my SUV. Much better than a 12V compressor. Highly recommended. Good quality and smart design.
1827761
This pump has been a workhorse in quickly and efficiently filling my water toys to about 2 -2.5 PSI.  It also comes with a pressure relief valve that reportedly stops filling pressure at 1.4 PSI (I have not used the pressure relief valve). This unit took the brunt of the work in filling my inflatable paddleboards, allowing me to spend much less time getting on the water.  The unit comes with multiple attachments that are tethered to the hose, making it versatile in filling a variety of water toys.

Keep in mind that this air pump fills to a pressure of 2-2.5 (in my experience) so if you are filling anything that requires more pressure (whitewater rafts, inflatable paddleboards, etc) you will still need to hand pump. Additionally, this pump draws power from your car battery, requiring you to be comfortable attaching clips to the battery terminals. Follow the directions and pay attention to what you're doing any time you are touching a car's battery.
1217525
This little machine is well worth the price. It does what is says, it's much more quiet than those you plug into the cig lighter, air hose stretches the length of my car, pressure gauge seems right on, all the attachments make sense and it's quick to pump up your tire. We're talking seconds per psi. My tires are high performance and need 35psi and I have no problem with this pump getting the job done fast. The screw on nozzle is fine and I only lose maybe a half psi when I unscrew it.  You will though need an extension cord (3 prong ) as the cord it comes with is a little short, as you can see in the photo. I gave it a four rating because of the cord length. All in all a good machine.
548192
Great little product.  I have saved countless dollars avoiding tire replacement when the air in the tires was low.  Just pull this small tool out of the Trunk, plug it in and in a few minutes the low tires pressure is fixed.  No worrying about how far to the next air hose, whether I have enough quarters in my pocket to purchase "free" air.  This small pump is powerful enough for most tires, has a readable gauge.  This model has an additional benefit in that the interface with the tire stem is a screw-on adapter.  Gives a tight fit to the tire stem without having to constantly be holding a application nozzle to the tire stem. Very practical
2146571
Hooked this up to my air compressor using the provided quick connect and rapidly filled the tires on three vehicles, a wheel barrow and a bicycle.  Really convenient not to have to go back and forth from pressure gauge to hose nozzle until all tires are at the correct pressure. So far so good.
3291963
Used this pump to quick patch my tire on my motorcycle a couple times. Takes a while to get it to pump to 30+ psi but it does the job well.
3482240
excellent gadget....fills motorcyle and car tires in seconds
1230540
This pump does what it says and does it well. Easy to attach to valve (I have only Presta) and inflates quickly. The dial is easy to read and the little red marker makes it quick to go to the desired pressure without actually having to read the numbers.
4248634
This is a great single action pump for the price, I had no problem getting near 100 psi . A double action pump would be faster but this fits my needs perfectly.
1849290
This is a fabulous piece of equipment. I have an issue with corrosion on my aluminum wheels (I live in Michigan, so no surprise there), causing my tires to leak air, but it's not at the point yet where I need to replace the tires and wheels. Until then, this is an easy and quick way to keep those tires at the right pressure.  And it beats going to the gas station and fighting with their machine hands down. This is very light, and very portable, but it does the job, and does it well. I can check my tires and top them off in my driveway with no fuss - and this particular model has a very long cord so you can reach all your tires with it - and I drive a humongous Durango SLT. Everything has a storage niche to you can put the parts away neatly when you're done. The only thing is, mine did not come with the ball needle and other accessories shown in the pic. That wasn't why I was buying it - I don't really care - but if you are planning on using it to inflate anything that requires a needle you might not get it, so check the box carefully.
2527190
Skeptical about spending so much money on a bike pump. No regrets after using it the first time. The pressure gauge is awesome and makes the job much easier. I got four tires to 40 PSI in no time at all. The yellow triangle that rotates to the desired number is also a big plus! No need for reading glasses to know when your at the desired pressure. This is a rock solid pump and highly recommended for accurate and rapid tire inflation.
3654549
Compact and easy to use. I tried it on my kids bike and was able to top up both the tires in a matter of minutes. Looks strurdy but is light weight. I was missing the accessories (valves and adapters) and the seller promptly replaced the same. So far am happy with the pump and it does a great job
2211806
Arrived in three days, a lot faster than expected. It's preset for a Schrader valve for standard tire nozzles and adapts easily for a Presta (French) valve used on high performance racing bikes. The gauge is easy to read while standing and inflated my tires very quickly. Two other connectors are included, one an inserted basketball needle and an inflation cone for air matresses and beach balls.  Diagrams for connecting the pump head are included for all 5 uses. Make sure you check your tires maximum air pressure. The instructions warn to not overinflate, which is easy to do since the gauge goes to 140psi. YouTube has a short video that demos the pump for a bike if you need a preview.
3663432
This is a great emergency pump, and it's saved my butt a couple of times.  Like all of Lezyne products it's designed well, functions well, and is reasonably priced.

The pump is compact, light weight, and looks good.  It comes with a mount that bolts on to the bottle cage bosses, and it can be mounted behind the bottle cage.  The mount sticks out to the side of the bottle cage, so it doesn't get in the way of your bottle. The pump clips into it and it has a strap as well for added stability.  I have mine mounted to the seat tube bosses, so the pump sits parallel to my seat tube.  It looks good, and I never even notice it's there (until I need it).  One complaint I have about the mount is that the plastic on the one I had on my mountain bike snapped.  The strap still held the pump on, but it was rattling around.  I ride some pretty rough and bumpy trails, so a metal mount would have been more durable.  On my road bike it works fine, though.

Operation wise the pump performs flawlessly.  The air tube is really nice, and securely threads onto your presta or schrader valve so you don't have to worry about losing your pump strokes.  This also makes the pump more durable compared to other pumps that don't thread on to the valve stem.  The seals on pump heads that don't thread on can tend to wear out from the continued motion of pumping.  It does take quite a few pump strokes to get a 700x23c road tire up to adequate pressure, I think I counted at least 100 strokes last time I had to use it; but that's to be expected considering the size of it, and if you're getting flats so often that this is a burden then you have bigger problems.

Overall I'm highly satisfied with this pump.  It looks good, is low profile, performs well, is durable and dependable, and is reasonably priced.  I wouldn't be caught on a long ride without an extra tube and this pump.