You're cruising along on your bike ride through the country, and all of a sudden you get a flat tire. You're in the middle of nowhere. You have miles to go. So what do you do? Just use your bike seat, that's what!

An absolute necessity for the serious bike rider, this "Tire Pump Seat Post DSP 138 - SL" sold by Doppleganger is a bicycle seat and air pump all in one. If you're riding along and you notice your tires losing air, or if you get a flat, all you have to do is get off your bike and use your seat. You release the seat post from the frame, pull out the tube that's attached to the post, connect it to the valve, and move the handles on the bike. Then put everything back to where it was, jump on your bike, and life is good.

The body of the seat post is made of a light aluminum alloy, making it durable and resistant to corrosion. It comes in silver and black, and retails for 3265 yen, or about 35 dollars, on Amazon and the Doppleganger website at

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