Bike Pumps: 5 Fast Facts

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Fact #1. Bike pumps work by pulling in air, compressing it, and then forcing it out and into a tire. All manual options have a metal or plastic shaft. This is designed to contain the air that is sucked in when you pull the handle upwards. When you push down on the handle, the compressed air inside the shaft is then forced out.
Fact #2. Most units usually come with either a Schrader or a Presta valve. Some higher end models feature an All Valves Adjustable Connecting System, which can work on both types. Bicycle tire tubes also come with either a Schrader or Presta valve to correspond with the ones found on pumps.
Fact #3. Bicycle pumps come in a few different styles. The standard floor pump is what you'd find in most garages or storage closets. They're large, but what they lack in portability, they make up for in speed. Then there's portable pumps. They come in two styles: frame-fit and mini. A frame-fit snaps directly onto a bicycle's frame. Mini versions are compact enough to fit onto a small hydration pack. Most people choose to mount them directly onto their bike frame.
Fact #4. There are also C02 models available. These don't require any manual pumping. Instead, they use a C02 cartridge, which is capable of delivering enough air to fill a completely empty tire. They can also be used to top off a deflated tire multiple times before being emptied. These are the lightest and most compact pumps available.
Fact #5. Before purchasing any pump, a cyclist needs to know what type of valve their tires have. Schrader valves are the most common, but it never hurts to double check. If you're unsure of your bike's valve type and don't know how to check, choose a pump that has an All Valves Adjustable Connecting System. Also be sure to consider the materials of the valve head. Metal is more durable and stand up to wear better than plastic.