Bike Electric Air Pump: 150Psi Portable Bicycle Tire Pump with Digital Pressure Gauge for Road Bike, Mountain Bike, E-Bike, Motorcycle with Presta, Schrader, Dunlop Valve Accessories

Honestly thought this was going to be a bad product as it's so cheap, but I’ve been using every week for almost a year and it’s perfect. Lightweight, fairly small with a good case. Battery has enough for a few pump ups. I pump mine to 150psi no trouble, takes about 2 minutes if that. Loud, but they all are. Very good product, looks great and super easy to use

Arrived as described quickly and well packaged. There are some simple instruction on the use of the pump unit; which are easy to understand and follow. The pump unit is partly charged on arrival, to charge use the supplied USB to USBC lead via laptop, phone charger etc. The connecting hose and assorted adaptors are nice quality. But making the last connection to which ever valve type can be a little annoying as you need to rotate the whole pump unit to connect the threads together. The unit works really well can quite quickly inflate my flat large mountain bike tires no problem at all. Many thanks to who ever made this pump.

Arrived same day which is above and beyond. Only used once, but electric pump seems great and exactly what I was looking for. Very easy to use. Pump screws on to valve and pumps air like a compressor which technically it is so no more of that valve pressure when releasing hand pump. I was always afraid I would rip the valve when pulling off. Pump shits off automatically and psi is much more accurate than hand/foot pump- I checked pressure with a separate pressure reader device. I only used once so I cannot comment on longevity of electric pump, but so far so great. Recommended for sure.

I bought this on a Prime deal for just under £25 and it’s been a great little tool for keeping my Brompton tyres topped up. It’s compact enough to carry around and takes the hassle out of manually pumping to 100psi (which is no small task even with a track pump). t’s about as loud as you’d expect from a small compressor. If you’ve used a 12V car tyre inflator before, it’s in the same ballpark. Not quiet, but not unbearable either. One thing to flag: this may be a design change, but the presta adaptor fully detaches from the hose, which wasn’t the case in the videos. It’s a small change, but it does mean you could easily lose it if you’re inflating tyres out and about. For that reason, I’ve knocked off a star. Still, for the price and convenience, I’d happily recommend it to other cyclists.

First try, this seems to work well. We have both schrader and presta bikes at home, and when looking at various pumps on Amazon I had trouble figuring out whether the pumps would work with a presta stem. This one does. But the directions are not entirely clear, so for what it's worth on just this small point: The hose connector is for both presta and scrhader. Don't worry about the other adapter in the bag if all you want are these two types. It comes set up for schrader. Just connect the main hose. Turn power on by holding button for 3 seconds. The air pressure indicator was preset at 100 but it was easy to hit the minus button to get it down to 80 for my tires. Screw the end onto the schrader stem and the tire pressure should show up. Then a single press of the power button and it turns on and then will automatically turn off when it hits 80. The presta connection wasn't intuitive, to me anyway, but the connection at the end of the hose is about an inch long and made up of two main parts. If you unscrew the two parts you will be able to tell when the thread has come out. But what you can't tell is that it needs just a little tug and the two parts will slide apart about a half inch, exposing a small brass fitting. When you look in the connection you'll see that it has made room for the narrower presta connection. So, prepare your bike presta tube as you would to get filled up with a regular pump, then, like the schader connection, the presta connector will screw into your presta tire. For whatever reason my tires didn't automatically show the tire pressure, but I had to press the hose once toward the valve stem and the pressure then registered. I filled 2 bikes (4 presta tires) and I had to do that each time. Anyway, when reading the directions, it really didn't make sense to me. But after figuring out and then looking back at the directions, it made more sense. The diagrams could be a bit better. So, first time out, I filled 3 bikes (4 presta tires and 2 schrader tires). The battery indicator went from green to amber and then to red by the time they were all filled (but not flashing red). I saw one reviewer said that the battery didn't even last for one tire. But it wasn't that way for me. Still that's not great battery capacity for hybrid/commuter type bikes. Takes about an hour to recharge it back to green.