CYCPLUS AS2 PRO Tiny Bicycle Pump with Gauge, Max 120 PSI Electric Mini Pump, Auto Stop, with Presta and Schrader Valve for E-Bike, MTB, and Road Bike (2025 Updated Version)

I wasn't sure what to expect with this, as it seemed like a gimmicky thing that would never work as it was advertised. However, I loathe using mini pumps, and C02 pumps are a pain to carry and not always advised for certain setups. I've now had this thing for a bit and have used it to top off my tires, inflate new tubes, and also to seat tubeless tires on tubeless rims on four tires now, without issues. Overall, the size if this thing is surprisingly small, and it packs in any of my bike bags easily. It feels sturdy in the hand and like it could take a few drops on a hard floor. Installation for inflating tires with Presta valves can be a little tricky, as you've got to seat it down pretty hard on the valve to seal the opening. Also, do not try to seat your tubeless tires with the valve core removed. When I tried that, air just kept escaping. Putting the valve core back in allowed me to get the magic ping as I inflated the tires. No need for an air compressor! And I would say the complaints of the noise level on this thing are a bit exaggerated. Sure, it's not the most pleasant sound, but definitely better than an air compressor. I have not yet verified the accuracy of the built-in gauge, but it is super handy to have a gauge on-hand that is built into the pump. I will say that I was able to inflate two 2.3" 650b tires with tubes, then later seat those tires when converted to tubeless before I had to charge it again. For a ride where you might need to top off your tires, and worst case re-inflate after a patch or tube change, it should be more than adequate. My only complaint is the buttons and placement of the screen. As someone with CMC joint arthritis, pushing the buttons in or holding them down to pump tires is a painful and awkward affair. The screen can be hard to see depending on your vantage point, but I guess there is not really a better place to put it where it would work ambidextrously. Overall, this was a worthwhile purchase and I feel super happy it works to seat tubeless tires.

This little pump is amazing and doesn't take up much space in my bike bag. It pumps up quickly and precisely - which i love! Pick the amount of pressure and it pumps until it hits the target. I run tubeless on my road bike and it does great! I use it to pump up other riders tube/tires which requires more pressure - but no problem! This is a great little pump and worth every dollar!

The CYCPLUS tiny electric pump is a surprisingly capable tool in a very compact form. I’ve used it for my road bike (high-pressure presta tires), and it handled without issue. It reaches the advertised PSI (up to 150) and shuts off automatically at the set pressure, which is a big plus. Battery life is solid, I’ve gotten multiple inflations on a single charge. Build quality is excellent, and it fits easily in a jersey pocket or saddle bag. It’s a great emergency pump for cyclists who want an alternative to CO2 cartridges or manual pumps. The digital gauge is reasonably accurate, and it charges via USB-C, which is convenient. Highly recommended for anyone looking for a reliable, portable inflation solution on the go.

I’ve been using this pump regularly for months. I use it every day to top up my tubeless 700x19 presta tires before riding as seen in the video. It’s small and carries nicely in my jersey pocket, is relatively light, and well made. There’s more than enough battery to inflate the tires a couple of times. It charges quickly so I top up the tires, put it back on the charger, finish getting ready to ride (5-10 minutes), and then put the fully charged pump in my jersey pocket. I also use it to top up my motorcycle tires. It can add ~3 psi in about 2 minutes into a 195/55-17. I don’t rely on it to reinflate that tire; I carry a 12V pump that runs off the motorcycle battery for that. While it can get hot when running for a minute or so, the included form fitting cover buffers the heat and stays on the unit all the time. UPDATE: April 18, 2026: The pump indicates it's fully charged but displays "E1" when I turn it on...and doesn't operate. It had a 2 year warranty and I've sent a warranty claim to Cycplus. I'll update this review again when I get a response. Regardless of response from Cycplus, I've dropped my star rating to 3 stars as the pump only worked for a year. UPDATE: April 23, 2026: CyclPlus customer support was very responsive, asked for a video to show the symptom, and next day initiated shipment of a replacement without requiring return of the defective product. While I'm disappointed the product in failed after one year, the customer support and warranty replacement was outstanding.

I had this pump and it worked great (though really only used to change the psi of my tires when transitioning from gravel to road). After 10 months it stopped taking a charge. I reached out to Steven at customer support, he asked for a video showing what was going on, and literally 26 hours after I sent the video Amazon arrived at my door with a replacement. I’ll give 5 stars just for the customer service. I’ll use this second pump for a while and maybe update my review if warranted.

I am an old(er) cyclist. During my 50+ years of cycling I have seen many new cycling products, claiming to be the best thing since sliced bread, come and go. I can safely say that these mini-inflator e-pumps are truly a game changer. No more need to carry CO2 cartridges. No more adding to the local landfill with spent cartridges. No more having to deal with CO2 inflators that are often finicky causing the loss of an entire cartridge. No more frozen fingers as CO2 cartridge release their gas. Let me cut to the chase. On a recent 60 miles ride I had three punctures. It is goathead season around here and the particular road that I was on gets its fair share of those little devils. I was able to fix and fully inflate all three punctures up to 75 psi. I still had one more bar showing on the digital display. I guess that if I had one more flat I would have to use my back-up pocket mini-pump. But that would have been OK. This pump is well made, it works fast, the noise level is minimal, especially out on the open road, the digital gauge is a plus and it fits just right in my saddle bag where two CO2 cartridgesand the inflator valve formerly resided. If you want a well-made pump that works well, backed by a company with good experience in the field, and all at a reasonable price, look no further, this is YOUR pump. You don’t need to go to another manufacturer, pay more for their fancy-named product and wait in line because the owner cannot figure how to sell his pumps in the USA. Get this pump, you will not regret it.

Incredibly small for what it does and the pumps/compressors it replaces. Plenty of power, does the job fast and pressure seems accurate. Yeah, 2-3 tires and then will need a recharge but that's expected since it uses a battery which is obviously going to be small. Sure, it's a little loud but corded pumps and compressors are much louder. Sure, it can get warm or bordering on hot but corded pumps and compressors do the same. This one is just far handier. Because heat and cold are no friends to batteries or rubber seals, I keep this stored in the house where the climate is controlled as opposed to the garage.

This is a cool pump. It is compact, but powerful. I splurged on a Lectric XP4 Long-range, Step-thru 750 Watt ebike. I had a flat tire and had to replace it with an off sized tube, which tends to leak. This little pump is easy and accurate and keeps me going.

Perfecto, pequeño y funciona muy bien.

Very well made pump. I am happy with the size and weight. The display is very usefull and I am using it to check my pressure. It is easy to carry in the back pocket of the jersey or in the downtube storage of the bike. I've made a stress test and pumped my 29x2.35" tire 4 times to 22psi and on the fifth the pump died. Four full inflations of tire are plenty. I reccommend it!

Nice replacement for a co2 or smaller pump

This pump is just perfect. The size, weight, pre-set PSI, speed, etc. I've already used it on a ride with a near blowout. Saved a 30-minute walk back to where I parked.

J’étais hésitant et sceptique concernant la performance d’un si petit compresseur/gonfleur des pneus pour les vélos. Finalement j’ai décidé de l’acheter. Je suis agréablement surpris car il est compact pratique et simple d’utilisation et je l’ai trouvé performant dans son rôle. Il tient dans la poche donc facile à transporter. Personnellement je recommande ce produit