It’s not, in my opinion. I bought one thinking it’d be better, but was disappointed in the inaccurate gauge. Got an AS2 Pro and it’s smaller, feels more solid, and is +/-1psi as advertised. Maybe the prestaflator will pump for longer, but that’s not my use case for one of these.
Does this charge with a USB-C or Micro USB cable?
Sure not faulty? The reviews have them as just as accurate but more inflations for similar weight.
The pump has to have an air inlet somewhere. Several brands use the USB-C port as the air intake. So there’s a direct path for water to contact the electrical circuits. If your pump came with a plastic bag to keep it dry, use it.
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I’d say it’s faulty, but I don’t know at what level (design, bad batch of sensors?) They curiously don’t list an accuracy spec on the website, just that it’s ‘precise.’
An MTBR member tested multiple of the little pumps and found a similar offset that I’m seeing. I’ve exchanged a couple emails with Prestacycle, so we’ll see what happens but I’m not expecting much. I like their chucks and compressor inflator tool.
I haven’t seen any other reviews with real pressure tests, but I know Dave Rome is working a new roundup for Escape that I’m sure will have lots of data.
When you do hear back I’d like to hear the upshot. I’m on the fence at the moment.
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USB - C
It’s so good. 5 year warranty ..
Just received a AS2 Pro Tiny E-Pump For Bike – CYCPLUS for my wife, much easier than CO2 / mini-pump and ideal when combined with tubeless and some Dynaplugs.
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Similar experience here - I got it for my partner as she travels a few times each year to race, and keeps buying/throwing away CO2s for every trip. This way she doesn’t even need to bring the foot pump (we’ve a portable one), or waste $10+ on CO2 that inevitable don’t get used. Plus, she’s a lot more comfortable with the AS2, you can screw up a CO2 and waste it, where the pump is quite forgiving and easy to use.
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Exactly, just makes sense.
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Unfortunately it didn’t make sense until she stopped to think, and realized between the two of us, we probably wasted $200 on CO2s and never used a single one 
I’ll still get CO2s for race situations, but otherwise 
I initially bought the larger cycplus pump that’s not something you carry in your jersey pocket but it works really well and I just use it for pumping up my tires before rides and it lasts a long time. Since I liked that so much I bought the mini so I could take it on rides with me.
What is the current recommendation for a pump that you can put in your jersey pocket? I think the Cyclami A2S has a good price and looks usable in the pictures
The Topump TB2 Pro is currently very very cheap on ali and is the same as the flextail tiny pro.
I suspect it isn’t QUITE as fantastic as a prestaflator or AS2, but I just got it for like 20usd.
I’ve had the Fumpa Nano pump for 4 years now. Still going strong after countless of rides in wet conditions.
It even survived a wash in the washing maching. I had it in my jersey pocket after a wet ride and when I got home i forgot to empty the pockets and it just went in the washer.
Zero problems still.
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The A2S is great. My first and only experience so far but very satisfied in its performance. Really like the ability to set pressure and have it stop automatically. Battery life is adequate for at least 3 inflations on a 28c tire. Used it 5 times now on self and friends, been very good all witnessing it were impressed.
While these are all obviously made in China, I don’t really get the temptation to buy the knock-off versions from Aliexpress vs some of the established ones on Amazon that have 1000+ reviews.
IMO it’s not worth saving 50 bucks to roll the dice on Aliexpress for something that could leave you stranded if it doesn’t work.
Yep, and being stranded isn’t even at the top of the list of concerns. For anything with a chargeable lithium battery, I’ll generally pay the extra for a reputable company who has something to lose in case of a product failure (they tend to have better quality control). Poor QC or bad/cheap design can result in these things turning into fireworks inside your house while being charged. A small lithium battery with a poor safety circuit can create a big fire.
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These pumps are literally all made in China, most of them are being bought from western resellers who rebrand the same item from AliExpress, and only one or two are even designed outside of China (maybe the prestaflator, bontrager and fumpa, but even then they might just have paid for the exclusive rights to a design).
Come on team, I thought we got past this jingoism with carbon wheels?
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I didn’t say anything negative about China. They have world class design and manufacturing capabilities. But just like most places, they make good stuff and they make crap. My point isn’t about country of origin, it’s that buying from a reputable company that has a bunch of QC folks (and lawyers) looking over everyone’s shoulders will cost you a bit more, but you have a better chance of having a safe product where corners are not being cut. Some things I don’t mind buying cheap and taking my chances. Some things I’ll spend the extra to improve my odds. I spent a bit of my career doing Product Management at a company that made electronics that included lithium batteries. And our parent company was a fortune 100 that was constantly breathing down our neck and making us go above and beyond for safety (particularly around the the lithium battery). It put us at a cost disadvantage to our competitors who used cheap batteries and cut corners on the charging circuits (and most customers didn’t care), but that’s how we rolled and our failure/accident rate was very low.
You can absolutely get lucky and end up with the same/similar quality product from a one man company if that person can source direct from the contract manufacturer and sell via one of the online markets. But it’s really hard to know unless they provide all the supply chain details (which they don’t). And guess what happens when a product defect is found? The big company will do a recall, the one man company will just close shop and start selling a different widget under a different company name.
Again, this isn’t about country of origin, it’s about buying from a brand that has a reputation and ongoing business concern to protect. And it’s a personal decision. If someone wants to buy the a cheap air pump form Ali, that’s cool, it’s just a bit of a crap shoot on something that can be pretty dangerous when charging. I feel the same about carbon wheels, bars, and frames, but totally understand that not everyone has the same risk tolerance as I do.
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