PRO BIKE TOOL CO2 Inflator - Quick & Easy - Presta and Schrader Valve Compatible - Bicycle Tire Pump for Road and Mountain Bikes - Insulated Sleeve - No CO2 Cartridges Included

This one the turning handle comes loose.

Used for first time today after a puncture. Easy to use, inflated new 40mm tube to 50psi (it doesn't come with the cartridges which I bought separately but the screw on collar ensures no leaks)

I haven't used this on a real puncture as of yet but tried it out on a spare presta inner and oh how easy it is. I've tried others in the past but always seemed to be hit or miss. The screw-on fit and lever operation of this inflator ensures no escape of much needed gas.Very pleased with this product and can't recommend it highly enough. A must for your emergency toolkit.

Twenty-four hours before I bought this item, I'd received a nearly-identical product from Lezyne: a tiny, immaculate, CO2 bike tyre inflater. Lezyne seemed to get the best reviews, and is a fairly well known marque. I thought I'd chosen the best option available. BUT ...Turned out that the Lezyne inflator has no internal threading, so you can't actually screw it onto a tyre valve, or, more important to me, you can't connect it to a high-pressure air hose or football needle adapter.But you CAN do all of this with the PRO BIKE TOOL device, which is the subject of this review. And it works a treat: an easily rotating "head" lets you screw down onto your valve (or needle or hose or whatever) without having to rotate the entire tool. The lever-style gas tap works perfectly, and although the manufacturers suggest otherwise, you can shut the flow off and keep the rest of the unused CO2 in your canister apparently indefinitely.I was so impressed, I also bought the PRO BIKE TOOL version with a built-in storage canister that can hold a spare CO2 bulb.Gorgeous kit, brilliantly designed and manufactured. Might even try it on my bike next time I need to pump my tyres!

I had previously purchased a similar item from Amazon and other outlets, however, they are the non adjustable valve versions. They seemed to work ok the first 3 or 4 times, what I don't like was the fact that as you screwed the co2 cartridge on some gas would escape, also regardless of the valve type they never seemed to seat properly so some more gas would escape, then after a number of uses when fitting a new cartridge I could hear a small amount of gas leaking out, this meant that you had to use a full cartridge each time, it was as if the small rubber seal was affected by the freezing gas and quickly lost its sealing properties, this happened to both units from different suppliers. As I commute/cycle 365 on my bikes, I became fed up having to keep buying new cartridges. I decided to buy the pro valve version as I have had the pro hand pump for years with no issues at all. I bought the co2 version in May and have been using it at times on a weekly basis on my road and mtb, what a difference, not only does no gas escape when screwing on the cartridge or seating it on the valve, you can add as much gas as you want and it doesn't leak at all, meaning you can use the same cartridge until its empty. They even give you a spare rubber seal which I have not had to use. I could not be happier with this product and wish I had bought it the first time. Note - as most cyclists know co2 slowly leaks through rubber so I have found that it works better if you pump up the tyre with air then top up with the co2 to the desired pressure, if you are not in a hurry. Lastly the foam cover is needed as they do literally freeze.

I bought this with my eyes wide shut,simply thinking that my wrists were painful enough just riding the bike (old injuries), without struggling to use a pump. I didn't know that CO2 permeates through the tube and tyre and that you lose pressure constantly, so didn't realise this is mainly for use when you are out and about and are fixing a puncture/replacing a tube, just to get you home so to speak.However, now I know its intended use I can categorically state that it is superb at its job and can highly recommend it. I've been cycling for decades and have always been prone to punctures, in my bike tyres mainly but elsewhere on occasion I have to admit.There's something very pleasing about being able to inflate your newly mended tube/tyre in 2 or 3 seconds, instead of having to faff about with a silly little pump (I don't care how good you think your mini pump is, it's crap, they all are, I've spent a small fortune on the sh122y little things). This co2 gadgy will ease the process of fixing your tyre fault and getting you home easily. Once you are home I recommend deflating the tyre completely and using a decent pump (12v, available on Amazon) to refill it with air., It will hold pressure as normal then.One last thing I must mention, the first one of these I ordered was a bit stiff to operate, I found it hard to turn the little lever. So, I emailed the seller with a simple enquiry as to whether this was normal, expecting to be told that I should put a spot of oil somewhere or other, (easy tiger). But no, much to my surprise and delight I received a replacement the next day, not just the valve but the entire product. the replacement was much easier for me to operate the little lever, so did the trick, can't ask more that that can I? The first on was just bad luck, one of those things, but the second was everything the reviews I'd read lead me to expect.I recommend this. Bigtime.