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MTB mini pump testSpecialized Airtool MTB - powerful but with weaknesses in detail

Stefan Frey

 · 28.04.2024

Almost a designer piece - the Specialized Airtool MTB comes almost entirely in aluminium
Photo: Stefan Frey

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With the Airtool MTB, Specialized delivers a fine example of a so-called high-volume mini pump made from aluminium. These powerful bicycle pumps are designed to quickly inflate voluminous MTB tyres. In the test, however, we uncovered a few weaknesses in the stylish pump.
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Specialised Airtool MTB mini pump - Features

Apart from the dust cap and the frame mount, the Specialized has no other extras to offer. However, it has a clever valve clamp that no other model offers. If you turn the piston rod, the pump head is fixed to the valve. The Airtool serves both Presta and Schrader valves and is largely made of aluminium.

To fix the pump head to the valve, turn the piston rodPhoto: Stefan FreyTo fix the pump head to the valve, turn the piston rod

Handling / processing

In practice, the valve clamp proves to be less practical because the hand easily slips off the piston rod. Classic clamping levers are less complicated. Switching between Presta and Schrader valves is also tedious because the cap sits very flat on the housing and is difficult to grip with your fingers.

The pump head must be unscrewed to change the valve type. Not quite so easy with the SpecialisedPhoto: Stefan FreyThe pump head must be unscrewed to change the valve type. Not quite so easy with the Specialised

Once the valve is clamped and you start pumping, you wonder where you are supposed to grasp the much too short handle sleeve. The rest of the mini pump, on the other hand, is easy to hold with its light ribbing. No corners or edges detract from the discreet design. Unsightly detail: While riding, the dust cap jerks loose and the valve head is unprotected from dust and dirt.

A dust cap protects the innards from dirt. Unfortunately, it comes off by itself during the journeyPhoto: Stefan FreyA dust cap protects the innards from dirt. Unfortunately, it comes off by itself during the journey

Pumping capacity / manual force

Measured in terms of size and weight, the Specialized is a stunner. It needs just 61 strokes to pump 1 bar into our test volume. The manual force required for this is around mid-range. The Airtool manages a maximum of 4.1 bar. This makes it a good option for gravel bikers who are in a hurry to inflate their tyres.

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The aluminium sleeve is slightly ribbed. This only minimally improves the gripPhoto: Stefan FreyThe aluminium sleeve is slightly ribbed. This only minimally improves the grip

Are you looking for a floor pump for the workshop rather than a mini pump for travelling? Read our last detailed test of 10 floor pumps.

Specialised Airtool MTB mini pump - info & price

  • Price 40 Euro >> available here
  • Weight 137 g / 21 g
  • Length / Diameter 238 mm / 25.5 mm
  • Valve type Presta / Schrader
  • Equipment Dust cap; aluminium body; bracket
  • Pump strokes per bar / pressure max. 61 / 4.1 bar
Almost a designer piece - the Specialized Airtool MTB comes almost entirely in aluminiumPhoto: Stefan FreyAlmost a designer piece - the Specialized Airtool MTB comes almost entirely in aluminium

Conclusion & evaluation

For its size, the Specialized fills an astonishing amount of volume per stroke. Its slightly ribbed aluminium body sits comfortably in the hand, but the grip sleeve is extremely short. This makes the Airtool very difficult to grip at the valve and you can easily pinch the ball of your hand. Annoying: The dust cap comes loose off-road and switching between valve types is not exactly convenient.

The Airtool puts out a lot of pressure, but weakens in handlingPhoto: Stefan FreyThe Airtool puts out a lot of pressure, but weakens in handling

Click here to go back to our overview article: 11 mini pumps in the test. There you will find all the important information on the subject as well as the remaining 10 models in the test field.

* Note: Weight, size and pump strokes per bar are BIKE measurements. We measured the pump strokes per bar with a precision manometer on the volume corresponding to a 29x2.35 inch tyre. The maximum pressure is a manufacturer's specification.

Stefan Frey

Stefan Frey is from Lower Bavaria and loves the mossy, loamy trails of the Bavarian Forest as much as the rugged rock of the Dolomites. For technical descents, he is prepared to tackle almost any ascent - under his own steam. As an accessories specialist, he is the first port of call for questions about equipment and add-on parts, while as head of copywriting he sweeps the language crumbs from the pages of the BIKE print editions.

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