milkit tubeless tyre inflator compressor

Is The New milKit Booster The Cheapest & Simplest Tubeless Tyre Inflator Ever?

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Sometimes it’s the simplest ideas that are the best. And when they’re cheap too, well, you’ve potentially got yourself something that riders are going to find very appealing.

Swiss brand milKit, inventor of that super clever tubeless valve system, had a new product to show off at iceBike*, and it’s called the Booster.

milkit tubeless tyre inflator compressor
Take one SIGG bottle, and a valve head on top, and you’ve got an genius tubeless tyre inflator!

Tubeless tyre inflators are a dime a dozen these days. The need is there – inflating a tubeless tyre from scratch can be a highly frustrating experience, because more often than not, you need a big burst of air pressure to help pop the tyre’s beads into place in the rim. Most people don’t own an air compressor, and using CO2 inflators is both wasteful and not always a guaranteed solution.

Although there are plenty of inflators on the market, milKit thinks it has a better, more compact and cheaper solution – and one that you can easily take with you on the trail.

milkit tubeless tyre inflator compressor
3D printed sample.

The ‘Booster’ is made of two components; an alloy bottle that’s manufactured by SIGG (Update: we’ve just had SIGG UK contact us to inform us that they don’t manufacture the bottle, which is not what we were originally told. milKit has also confirmed that the information we received was incorrect – the bottle is made by a different manufacturer, but with the same thread pitch and overall shape as a SIGG bottle) and a threaded inflator that threads into the top.

Weighing just 19g, the inflator will cost £24.99 on its own, or £39.99-£42.99 with the Booster bottle. According to milKit, because the Booster inflator uses the same thread as a SIGG bottle, you could BYO bottle. More on that down below…

The inflator shown here isn’t the production version – this blue one is actually 3D printed, but the overall shape and design is representative of what the finished product will look like when they arrive in stores in March 2018.

milkit tubeless tyre inflator compressor
3 steps to easy tubeless tyre inflation.

The concept is simple. You thread the inflator onto the bottle, fit your pump head onto the valve, and inflate to 160psi. You remove the pump head, then push the inflator onto the valve on your wheel, and the air rushes through the valve into the tyre, seating the tubeless beads in the process.

Pius – the founder and lead design engineer for milKit – claims that the small threaded inflator offers a much more direct line for the air to rush through into the tyre. Compared to other inflators that use extendable hoses that can result in pressure loss, this more compact design is more efficient for the delivery of that burst of air that helps to pop the tyre into place.

We shot a video with Pius to show how the milKit Booster works – check it out in the above video clip to see just how simple the process is.

milkit tubeless tyre inflator compressor
There’s a 1000ml bottle.

The Booster will be available with two different size bottles that can also be purchased separately; 1000ml (£19.99) and 600ml (£16.99). Both use the same standard diameter that means they’ll slot right into your bottle cage. But here’s where it gets interesting; because the bottle is made with the same thread pitch as a SIGG bottle, you could fit a standard drinking cap to it. There’s even a threaded adapter that connects to a drinking tube like you’d find on a hydration bladder.

So use it as an actual water bottle on your ride, and if you do get a puncture and need to re-seat your tyre, whip the inflator out of your jersey pocket or backpack, and you’re laughing – how neat is that!

milkit tubeless tyre inflator compressor
And a smaller 600ml bottle. milKit claims that the 600ml size is really all you need for even the fattest of tyres.
milkit tubeless tyre inflator compressor
Production versions will be available in the coming weeks.

The milKit Booster will be selling for £24.99 in the UK through Madison, and it’s due to arrive within the next month or so.

Because milKit is selling the bottles and inflators separately, hypothetically, if you already owned a SIGG bottle, you could just buy the Booster inflator on its own and use it with your current bottle. Of course SIGG definitely do not recommend this, and milKit can’t ‘officially’ recommend it either…

milkit tubeless tyre inflator compressor
Check the sealant inside your tyres without having to take the tyre off the rim.

In other news, milKit also had a great display showing off its unique tubeless valve system. These clever valves are designed with a one-way plunger that allows you to insert a thin hose through the valve to suck out sealant without actually releasing any air pressure from the tyre. The concept was to create a system that allows you to easily check the sealant levels inside your tyre. Because sealant dries out, and when it does dry out, it won’t do the job it’s meant to. The milKit system allows you to periodically check the sealant levels inside your tyres without any need for actually taking the tyre bead off the rim to physically look inside the rim.

milkit tubeless tyre inflator compressor
The hose protrudes inside the tyre to suck up the sealant, so you can see how much is inside.
milkit tubeless tyre inflator compressor
Like a science experiment for your tyres.
milkit tubeless tyre inflator compressor
The milKit valves are unlike anything else on the market.

For more information on the tubeless valve system or the Booster inflator, head to the milKit website.

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Comments (16)

    I used to know a nut with a rubber fixation. ;o)

    That booster’s really clever, I may well check one out when they’re on the market. Keep meaning to go tubeless again.

    25 quid? That is a bit of a shocker… I though, I had better deal by backing it up on Kickstarter.

    Looks like I should have waited. Would save about 10 quid :-/

    Not exactly impressed…


    Would also be nice if they got around to shipping the product for their kickstarter backers, or at least gave another update. Also feeling I may have paid more than retail too – but will wait to moan before I’ve seen the final retail prices on the kit due to me from Milkit….

    for 25 quid I might consider retiring my 2L coke bottle!

    … £25 is the valve section for the top of the bottle only – you’d need to add your own SIGG bottle to that for a functioning system…

    At £25 I might get one and do it properly rather than using my coke bottle and safety goggles!

    Anyone know.if that £25 price is for the top only or for the full item including bottle?

    Be interested in seeing it seal difficult to mount tyres. I can seat maxis tyres with a hand pump on stans rims.

    is it just my eyes or is that tyre not fully seated in the video. The raised rubber guide around the tyre that sits just above the rim line runs off into to rim to me. Maybe i’m wrong!

    Will any Sigg bottle of big enough volume handle the pressure? The one in the photos has a rounded bottom, whereas Sigg are all flat bottomed.

    Ah, hang on, reread the article, the bottle can be used as a water bottle, not the other way round, ie, using your own Sigg bottle for the compressed air.

    Neat. I think I might just have to get one of those. Especially after a stormy, alpine woodland, tyre unseating that was no fun at all.

    Needs an auto pressure release valve on it so those of us without gauges on pumps don’t blow our ankles off over inflating it.

    This information from Sigg Bottles UK. The bottle used in this product is NOT a SIGG and is NOT made by us. We do NOT recommend that any SIGG branded bottle is pressurised in this way.

    @sigg – Interesting!

    Appreciate your comment and clarification regarding the milKit Booster bottle. That certainly wasn’t the information delivered to us – unless some wires have simply been crossed in communication via milKit.

    I’ll go in and amend the article with the information you’ve provided, and we’ll get in contact with milKit for clarification regarding the Booster bottle.

    Thanks again for the clarification!

    ST Wil.

    I know that, Most people don’t own an air compressor, and using CO2 inflators is both wasteful and not always a guaranteed solution but I am a compressor user. I see a small powerful compressor on Dewalt 6 gallon. It is a small but very decent and powerful machine. Anybody can use this popular compressor.

    A mate of mine just had the thing blow up on him. The threads stripped at 100psi and gave him a nasty whack on the wrist. This was only the second time he used it.

    just saying…..

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