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.

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.

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!

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.

Works as advertised. I wanted a pump to top off shrader valve bike tires that could press on rather than screw on. That feature works for the tires I have. I have 2 bikes, one with tires topping out at 80 PSI (a hybrid type bike) and a beach cruiser with bigger volume tires topping out at 60 PSI. Topped off the 80 tires which both started at about 30 and then did a partial fill of one of the 60s (started about 30, pump battery died at about 45). Recharged and finished first 60 tire (started about 45) and then filled the second 60 tire (starting about 30). Can’t hear if any leakage of air since pump is so noisy, but it takes a couple minutes to fill. Shut off feature works when appropriate pressure reached. I could see the digital readout pretty well with the valve stem about 9 or 3 o’clock, which allowed me to use one hand to hold it in place while gripping the tire and without having to bend over further if valvestem at the bottom. Unit does get quite hot, but OK to handle with the included silicon sleeve. Not sure how it would do trying to fill a new tube from flat. I will likely use it as I intended for partial fills and as a backup on rides after using a CO2 cartridge to start. Four star rating for now since I would not trust it completely for a ride as my only way to pump up a replaced tube after a flat.

Perfecto, pequeño y funciona muy bien.

Die Pumpe ist recht gut. Ich verändere - je nach Untergrund - gerne mal den Druck. Dafür ist sie ideal. Klein u. leicht. Druckanzeige ist sehr gut und man kann den Zieldruck einstellen. Etwas laut aber ok.

+ Bra batteri. Tillräckligt snabb. Bra display och lätt att ställa in önskat tryck. - Aningen stor. Inte vattentät. Aningen dyr.

Perfect pump that fits in your jersey. No need to carry CO2 anymore. Very easy to use and the digital readout lets you know when you are at the desired pressure.

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