Blackburn Airstik 2 Stage Pump
|Price:||$26.95 & FREE Shipping. Details|
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- Presta-specific head
- Rebuildable internals
- Includes cage mount
- 84 grams
- 160psi max pressure
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|Material Type||[barrel] aluminum|
|Package Height||2.3 x 4.1 x 8.7 inches|
|Shipping Weight||0.4 pounds|
We find ourselves in an internal debate between the Blackburn AirStik 2Stage and the AirStik SL -- faster pumping or smaller size. If you need it on your bike for a race, do you want to save 26g or have almost twice the air volume per stroke? We go back and forth, but the greater air volume does seem worth the trade-off. The AirStik 2Stage can deliver 3. 5 cubic inches of air per stroke, which exceeds most other pumps that offer two different volumes per stroke. If you're not familiar with these, you should be. There is a switch on the pump, in this case on the bottom of the handle, which allows you to choose "high volume" or "high pressure." The latter is a polite way to say "low volume" -- something you will want as the pressure in the tire gets to a certain point as it makes the pumping easier. While the 2Stage is bigger than the SL, it's still pretty small. It is 172mm long when closed and has a 98mm long pump stroke. The barrel and shaft are aluminum. We wonder if one of the things we like about this pump is that Blackburn hired a suspension fork engineer to work on their pump line. The result is mini-pumps that use the shaft space as an air chamber, which makes the pump action more stable and delivers more air per stroke. The Blackburn AirStik 2Stage comes with a mount that fits under a bottle cage. The head is designed for Presta valves only. Maximum pressure possible with the pump is 160psi. While this may not be important to you, Blackburn has made the pump so it can be rebuilt rather than tossed when a part breaks. There is a lifetime warranty on the pump. The pump comes in one color: Black. Claimed weight for the AirStik 2Stage is 84g. Rebuildable so you can keep it clean and working smoothly for lifeCage mount included so you can use it out of the box
Top Customer Reviews
I like that it fits in my jersey pocket without a fuss: it barely sticks out the top, and it's so light I don't notice it's there.
When I have to actually use it, it works respectably--on my 29er I have to pump for a while to get reasonable pressure, but it's not too bad. The two-stage thing is very useful when I'm on my CX or road bike: you can get an initial bulk of air in there quickly, then shift it into low gear and easily (albeit slowly) bring the tire up to riding pressure.
The head is just OK-- works fine for my presta valves, but nowhere near as nice as pumps with a flexible hose. You have to be careful when pumping so you don't bend the valve stem or knock the pump head off... but it's a trade-off I willingly make to get the compactness and functionality.
The short answer is that the 2-stage mechanism really worked. With the pump switch set at "low", I was able to fairly quickly inflate the newly installed tube to full size and reasonable thumb-pressure firmness. This was maybe 60 lbs pressure, and maybe it took 60 strokes. Switching to "high" on the pump end, I tested to see how firm the tire could really get. On this setting, each stroke delivers only a small volume of high pressure air, but it makes a difference. After about another 60 strokes, the tire was quite firm to the touch (and I'm estimating that it resulted at about 100 psi). For getting back on the road, this was fine.
Would I use this as my everyday pump? Of course not. Is it adequate to get you going again? Most definitely.
Obviously, I can't comment on its longevity at this point, but I'm satisfied so far. As to the mounting...the clip mount and elastic closure appear durable enough. The supplied mounting clip fits beneath a water bottle cage's threaded openings, and longer screws are provided. Mine is mounted on the seat tube, away from the drive-train side (left crank), just above the front derailleur moung. I have no problems with rattling or any sense that it could become loose.
It's also compact enough to simply slip into a rear jersey or jacket pocket, if you choose. I wouldn't recommend this pump for larger volume, lower pressure hybrid or knobby tires, as you'd be pumping forever. Buy a larger frame pump for that purpose.
Small size, light, and decent pressure. I'd recommend.