I recently discovered a very practical cycling equipment - this foot-operated air pump is my lifesaver! Last week, my tire suddenly leaked during a bike outing. Thanks to the air pump in my bag, I didn't have to look for an air pump everywhere. I just stepped on it a few times and it was done. What surprised me most was that it inflated very quickly. It only took two or three minutes to fully inflate the mountain bike tire. It is the size of a palm when folded up, and it doesn't take up any space when stuffed into the side pocket of the backpack. In addition to bicycles, I often use it to inflate footballs and swimming rings, which is much more labor-saving than blowing with my mouth. It is also very convenient to inflate an inflatable sofa during an outdoor picnic. You don't have to look for a power source everywhere, just step on it. Now I must bring it every time I go out for cycling or camping, and I don't have to worry about the embarrassment of not being able to find an air pump!