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Birzman E-Grip 16g CO2 Inflator



Nicely engineered inflator that's effective and pleasant to use
Reliable, progressive inflation
More refined head than budget models
Grip is trickier to swap to bigger cylinders than some

At every product is thoroughly tested for as long as it takes to get a proper insight into how well it works. Our reviewers are experienced cyclists that we trust to be objective. While we strive to ensure that opinions expressed are backed up by facts, reviews are by their nature an informed opinion, not a definitive verdict. We don't intentionally try to break anything (except locks) but we do try to look for weak points in any design. The overall score is not just an average of the other scores: it reflects both a product's function and value – with value determined by how a product compares with items of similar spec, quality, and price.

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The Birzman E-Grip 16g CO2 Inflator is a compact and generally likeable design, which allows progressive and efficient post-puncture inflation. The threaded system is not only reliable, it's proven compatible with unbranded, generic cartridges. Aside from having readily available spares, this means you can plug in big cylinders for rapid resurrection of touring and gravel tyres.

For your £14.99 you get a nicely CNC machined, anodised aluminium alloy head with laser-etched detailing. The head is designed to accommodate both Presta and Schrader valves – useful if you have road and mountain bikes, and could come in handy for rescuing a riding companion, or if you're riding a road-biased build with a trailer/tagalong behind.

> Find your nearest dealer here

The head is a press-fit design, which some will argue is less secure than the threaded type, but it overcomes two major difficulties: the risk of unthreading a removable valve core, and the pain (literal and metaphorical) of having to touch and uncouple the inflator head.

As with most designs, it employs controlled release, so pressure is easily regulated. I've never blown a 700x25 or a lower pressure, big volume tyre using a 16g cartridge. Nonetheless, blowing a new tube to smithereens defeats the object somewhat – especially on a cold and rainy November night.

In some respects, the Birzman's performance is on a par with other systems, but the detailing means it's a notch or so nicer to use than some otherwise adequate budget models.

Using the stock cartridge, it raised a 700x26 tyre from flat to 110psi in three seconds. Switching to an unbranded 16g cartridge it took under five seconds to get a 700x32 to 70psi (10psi short of its maximum recommended pressure).

> How to choose the best tyre pressure

A bigger 25g cartridge breezed a 700x38 tube to 85psi in four seconds and a 26x2.0 tube to 46psi (14psi within its maximum), albeit at a more pedestrian nine seconds – but that's a whole heap faster than you'd ever get using a mini pump.

The Birzman's neoprene sleeve feels a little thin compared with some, but protects palms and fingers perfectly well, even after having to stretch it (in warm water) to fit 25g cartridges.

Canister size has more influence upon pressures achieved, but a head offering consistent, efficient delivery gets the best from them. The Birzman's design is pretty foolproof on the unintentional discharge front, too, provided you don't screw the cartridge fully home. In my experience, some budget inflators heave a less precise thread which can lead to accidental release; hence I keep the cartridges uncoupled until I need one.

> Step by step: How to fix a puncture

One thing to bear in mind: while CO2 will rescue you by the road/trailside, it will quickly leach out from the tyre/tube, so it's a good idea to deflate and refill it using your track or hand pump when you get home. Otherwise you'll think you've another, slow puncture the following morning...


At £14.99, the Birzman is certainly at the lower end of the price point. Muc-Off's CO2 Inflator Kit is a screw-on design and includes a second canister but costs a tenner more – as does Lezyne's Control Drive CO2 Inflator

Genuine Innovations' Ultraflate CO2 Inflator costs £19.99 but does come with a 20g canister and is quite innovative, albeit a bit heavier.


I'd never want to rely solely on a CO2 inflator and always carry a mini pump and Presta/Schrader adaptor (in case I need to use a garage airline). Nonetheless, for £14.99, the Birzman is a neatly executed and seemingly reliable inflator kit with decent features.


Nicely engineered inflator that's effective and pleasant to use

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Make and model: Birzman E-Grip 16g CO2 Inflator

Size tested: 4.2 x 2.3 x 1.4cm (valve head)

Tell us what the product is for and who it's aimed at. What do the manufacturers say about it? How does that compare to your own feelings about it?

Birzman says: "Made of CNC machined aluminium for long-lasting and regular use, the E-Grip CO2 Set will work with Presta and Schrader valves for an efficient and effort-saving experience.'

It's pleasant and efficient to use, as it says in the blurb.

Tell us some more about the technical aspects of the product?

Birzman lists:

Material: CNC machined aluminium (valve head), Neoprene (grip).

Size: 4.2 x 2.3 x 1.4cm (valve head).

Weight: 15g (valve head).

Includes: 1 x 16g cartridges & 1 neoprene grip.

Rate the product for quality of construction:

Solidly made, comfortable to use.

Rate the product for performance:

The head's release ensures controlled, consistent delivery of CO2.

Rate the product for durability:

Seems well made, with little sign of potential weak spots.

Rate the product for weight (if applicable)
Rate the product for comfort (if applicable)

The neoprene sleeve prevents painful digits during discharge.

Rate the product for value:

Tell us how the product performed overall when used for its designed purpose

Using the stock cartridge, it raised a 700x26 from flat to 110psi in two seconds. Switching to unbranded 16g cartridge raised a 700x32 to 70psi (10 psi short of its maximum recommended pressure) within five.

Using 25g cartridges breezed a 700x38 to 85psi in four seconds and a 26x2.0 to 46psi (within 14psi of its maximum), albeit at a more pedestrian nine seconds.

Tell us what you particularly liked about the product

Neatly finished, effective and reliable.

Tell us what you particularly disliked about the product

Nothing of particular note.

How does the price compare to that of similar products in the market, including ones recently tested on

It's at the lower end of the market: Muc-Off's CO2 Inflator Kit is £25, as is Lezyne's Control Drive CO2 Inflator, while Genuine Innovations' 20g Ultraflate CO2 Inflator costs £19.99.

Did you enjoy using the product? Yes

Would you consider buying the product? Yes

Would you recommend the product to a friend? Generally speaking, yes.

Use this box to explain your overall score

It's good: nicely engineered, reliable system and favourably priced.

Overall rating: 7/10

About the tester

Age: 46  Height: 1m 81cm  Weight: 70kg

I usually ride: Rough Stuff Tourer Based around 4130 Univega mtb Frameset  My best bike is: 1955 Holdsworth Road Path and several others including cross & traditional road

I've been riding for: Over 20 years  I ride: Most days  I would class myself as: Experienced

I regularly do the following types of riding: cyclo cross, commuting, touring, fixed/singlespeed, mtb,

Shaun Audane is a freelance writer/product tester with over twenty-eight years riding experience, the last twelve (120,000 miles) spent putting bikes and kit through their paces for a variety of publications. Previous generations of his family worked at manufacturing's sharp end, thus Shaun can weld, has a sound understanding of frame building practice and a preference for steel or titanium framesets.
Citing Richard Ballantine and an Au pair as his earliest cycling influences, he is presently writing a cycling book with particular focus upon women, families and disabled audiences (Having been a registered care manager and coached children at Herne Hill Velodrome in earlier careers)

Add new comment


wtjs | 3 years ago
1 like

These cyclinders are a significant addition to litter, which I see in roads in town and remote country. I won't be using them, as the Aldi mini pump costs about £4 and lasts for years. Not as quick, but not bad.

Chris Hayes replied to wtjs | 3 years ago

It's a fair point, but are you sure that you're not confusing CO2 cannisters with the piles of nitrous oxide (laughing gas) cannisters that are commonplace in certain outside my front gate in Central London (not my doing, I might add).

kevvjj replied to wtjs | 3 years ago

So, you refuse to use them because other people litter with them... crazy logic.

Captain Badger replied to kevvjj | 3 years ago

Certainly debateable, but not crazy. Why would you help to support an industry that contributes to litter, when there is a perfectly reliable no litter alternative?

mdavidford replied to Captain Badger | 3 years ago

Just for the sake of argument, it would seem a bit odd, for example, to say you're refusing to use a mattress because you often see them fly-tipped at the side of the road, and there are alternatives (an airbed, sacks stuffed with straw...).

Captain Badger replied to mdavidford | 3 years ago

My point was that describing wtjs' decision as crazy was wrong. Taking a principled stand on what industries to support (regardless of what others do) I believe is to be applauded. Whether it is misguided, or fruitless may be debated, but I don't see it as crazy.

Matresses certainly have an end-of-life disposal problem that (I don't believe) is adequately answered, evidenced by amongst other things the fly tipping issue. If an indiviudal sees this issue as at least in part the responsibility of the manufacturer, they are perfectly at liberty to choose a product that fits with their ideals.

Is this not the same principle that at least partly drives critiscism of Ineos for their environmental record?

mdavidford replied to Captain Badger | 3 years ago

Fair enough, but kevvjj didn't describe it as 'crazy' - they said it was 'crazy logic' - i.e. it was just a colloquial way of saying it was illogical.

(Although personally I would steer clear of the word 'crazy' in the first place, as it's pretty problematic.)

Captain Badger replied to mdavidford | 3 years ago

Okay, I don't want to get into the semantics of the fine line between crazy decision, and crazy logic.

I think w's stance is a reasonable one. I take a similar one on bottled drinks. I don't want to support this incredibly wasteful and pointless industry. Is that stopping other folk littering? No. Am I consistent? No, I have several matresses . Will I then abandon considerations or principles  regarding environment or other ethics cos I'm not very good at it? No - and others will no doubt cast judgement as to whether I'm "crazy"

Drinfinity replied to Captain Badger | 3 years ago

So you think those littered cylinders are from teenagers in car parks having late night tyre changing competitions? 

Captain Badger replied to Drinfinity | 3 years ago

Is that a question or an accusation?

If the former it is irelevant, if the latter it is baseless.

aDub | 3 years ago

I buy cheepo CO2 cartridges and use bits of an old innertube to make sleeves to protect me from freezing and to stop rattling in my saddle bag. The sleeves can be reused.

I too carry a Presta/Schrader adaptor, but not a minipump.

The only problem with CO2 is that part-used cylinders are always flat when you go to use them again no

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