Battery mini pump test: What can the Trek Air Rush do? Answers in the TOUR test
Thomas Musch
· 22.09.2025
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They are still relatively uncommon - but when they are used, some veteran road cyclists are left open-mouthed. The way a small battery pump like this, conjured out of a jersey pocket, brings the tyre back up to operating pressure in no time at all is a pretty cool event. Put it on, press the button, wait, done. It's no wonder that this arouses enthusiasm: although you've practised using the Co2 cartridge pump once, you're guaranteed to have forgotten it by the time you have your next puncture and let the meagre supply of air hiss past the valve into the open air. And many also remember with horror the 537 pump strokes with the mini-pump in order to at least hobble home on the sparsely filled tyre.
Bicycle pumps in transition
A brief digression into cycling history: A few pedalers still remember that every racing bike used to come with a full-size air pump, which made inflating a flat racing bike tyre a breeze. It took no time at all, and 7 bar and more was not a utopian dream. But well, at some point these pumps became uncool and there is no longer any room for them on modern bikes.
Back to the digital-electric Rubik's Cube, in this case from Trek. The Air Rush with lithium-polymer battery (3.7 Wh) is a pleasingly compact plastic box measuring 80 x 45 x 32 millimetres and weighs 83 grams - which is easily compatible with jersey pockets. Three operating buttons can be used to switch the device on and off, preselect the desired tyre pressure, change the unit (in psi, bar and kPa) and start the pumping process. When the set target pressure is reached, the pump switches off automatically. A lamp on the side can be switched on separately; it lights up automatically during the pumping process and illuminates the area around the pump or impeller valve. The Presta or Sclaverand adapter can be screwed directly into the housing or onto one end of an eleven centimetre long hose, which facilitates access to hidden or confined valves. The 23x12 millimetre colour display is remarkably bright, crisp and very easy to read.
When you switch on the pump, you are almost startled by the bright, sharp buzzing sound, which becomes a little more sonorous as the pump continues to run. We have not determined decibel values, but we would describe the noise as loud. We don't think it's a good idea to briefly check the tyre pressure in the stairwell at half past six in the morning.
Practical test of the Trek Air Rush pump
When the pump is used in the event of a puncture to refill a repaired or replaced inner tube, it does its job well. It inflates a 32-millimetre tyre to 5.5 bar in just under two minutes and gets lukewarm in the process. This changes when you try to inflate a second tyre immediately afterwards. The pump cuboid has a lot to do with this and switched off in the test after a good two and a half minutes at just under five bar due to overheating (error code E01 in the display). In this case, according to the manufacturer, the pump should be given ten minutes to cool down. You do this willingly, because the pump and hose are then so hot that you don't burn your fingers, but you don't really want to touch them either. In the end, however, the Air Rush keeps the manufacturer's promise and inflates two road bike tyres. When deflated, it takes around an hour to be revitalised using the USB-C cable (included). Trek state a maximum pressure of 8.27 bar; we didn't check this due to the lack of a suitable wheel and tyre combination. The pump costs € 89.99 and is available at available here.
We suspect that the battery mini pump accessory could catch on fairly quickly. It speeds up and simplifies repairs in the event of a puncture and makes them considerably more convenient.
Trek Air Rush: Technical data
- Dimensions: 80 x 45 x 32 millimetres
- Weight: 108 grams (manufacturer's specification; weighed: 131 grams)
- Tyre pressure: 0.14 - 8.27 bar
- Units: Bar, Psi and kPA
- Battery capacity: 3.7 Wh
- Battery: Lithium polymer#
- Charging connection: Standard USB-C
- Price: 90 Euro >> available here
Thomas Musch
Publisher
