The task at hand was to use and review the Second Wind MTB, but my destiny was to become an inflator convert! In the past I have seen folks bumbling around with CO2 inflaters and I have always been of the mindset, why bother? Too often I saw folks blow through three CO2 Cartridges and still wind up pumping. Guess what? That didn't happen here! Two CO2 cartridges equalled three inflated tires (We also tested the Microflate which also worked perfectly for the third tire). No muss, no fuss no, waste!
The Second Wind is a two method inflator a hand pump and CO2 powered. First I tested the pump feature to inflate a road tire manually, meaning I used the Second Wind as a hand pump. Suggested for mountain bikes, it works quite well inflating to MTB pressures by hand pumping. Now that being said it took 165 pumps to inflate the road tire to "make it home" pressure. The larger internal volume of the MTB tire would require more pump strokes, but I guarantee you would get there.
The intelligent head (automatically adjusting to presta or schrader valves) was a bit balky coming out of the package, but once I learned out how to insert the valve properly into the head, things seemed to work themselves out nicely and I had no additional issues. All subsequent valve stems worked very nicely.
We then deflated the tire again and screwed a CO2 cartridge home and used the CO2 inflation feature. In a second the tire was rock hard. There was still enough CO2 left in the cartridge to inflate another tire to very nearly "make it home" pressure. Again a Mountain bike tire would probably use the entire cartridge. The trigger for inflation control was easy, smooth and accurate allowing for precise control. The lower volume of the road tire would have been over inflated if there was no shut off capability with the 16 gram cartridge.
How would I rate this device? Well just let me say that it is already mounted to my Burley Rock and Roll Tandem. The product works perfectly.