Getting high pressures out of a pump small enough to fit in a jersey pocket is always a challenge, but GT have nailed it with their Attack Mini Pump. Maximum tyre pressures are achievable and you don't have to have arms like Popeye to make it happen.
It doesn't matter how light the pump is, or how much air in a stroke the barrel can put out, if it isn't secure on the valve then it's worthless. To ensure a tight fit for the Attack, GT use a thumb lock, a simple right angled piece of aluminium that you can push over with your thumb while pushing the head on to the valve. It stays in place securely with a vice-like grip, taking the tube from flat all the way up to rock hard.
When in storage the Schrader/Presta pump head snap-fits into the pump handle, but for ease of use it's attached to a flexible hose that gives you an extra 130mm of length. I always find a hose helps because it stops the movement of the pumping motion from pulling at the valve and head connection.
A claimed maximum pressure of 120psi from a mini pump is always treated with scepticism, but hats off to the Attack. It gets there, and relatively easily too in terms of effort; it just depends whether you have the time because you're looking at more than 220 strokes. The last few taking some real pushing as well.
A more real world pressure of 100psi (25mm Contis) takes around 190 strokes, but it's not an effort to get there. The barrel gets a bit warm, but as long as you manage not to pinch your fingers between that and the plastic handle then the whole thing is a pretty easy operation. Which is exactly what you want when you're on the side of the road in the dark, freezing rain cutting your face in the gale force wind – because we all know that's when punctures usually happen.
The overall finish feels a bit cheap, but to be fair the Attack is cheap – though I think £16.99 for the performance is a bit of a deal. The sharp edges on the handle can catch your fingers and when your hands start sweating you can get the occasional slip, but overall the GT Attack is a great little mini pump with a well thought out design and secure performance. It's earned its place in my commuting rucksack – or you could attach it to your bike, as you get a small frame bracket and some extended cage bolts in the pack.
Small and cheap with awesome pumping performance
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road.cc test report
Make and model: GT Attack Mini Pump
Size tested: Black/Polished Schrader and Presta compatible
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?
It's a high pressure mini pump that's the perfect size for a rear jersey pocket.
Tell us some more about the technical aspects of the product?
*120psi/8bar max pressure
*Presta and Schrader compatible
Tell us how the product performed overall when used for its designed purpose
It does the job and at the end of the day that's the whole point.
Tell us what you particularly liked about the product
Secure valve connection.
Tell us what you particularly disliked about the product
Pinching my skin between plastic handle and barrel - best to wear your mitts.
Did you enjoy using the product? Yes
Would you consider buying the product? Yes
Would you recommend the product to a friend? Yes
Anything further to say about the product in conclusion?
It's a brilliant little pump that delivers highly on performance for such a cheap price.
About the tester
Age: 36 Height: 180cm Weight: 76kg
I usually ride: Kinesis T2 My best bike is: Mason Definition
I've been riding for: 10-20 years I ride: Every day I would class myself as: Expert
I regularly do the following types of riding: time trialling, commuting, club rides, sportives, fixed/singlespeed
Stu knocked out his first road.cc review back in 2009 and since then he's chucked the best part of seventy test bikes around the West Country, a couple of them quite literally! With three alloy and two steel bikes in his fleet he's definitely a metal man (that'll be the engineering background) but is slowly warming to that modern carbon fibre stuff along with fat tyres & disc brakes.
It's not all nostalgia though, after spending the last few years in product design Stu keeps banging on about how 3D printing is going to be the next big thing and he's a sucker for a beautiful paint job too.