What is "when you pump a bicycle tire?

When you pump a bicycle tire, you are adding air pressure to the tire to inflate it to the recommended level for optimal performance. This is important for several reasons:

1. Proper tire pressure helps prevent flats by providing the necessary cushioning and support to absorb shock and resist punctures.

2. Correct tire inflation increases rolling efficiency, making it easier to pedal and improving overall bike performance.

3. Overinflated tires can be prone to blowouts, while underinflated tires can increase rolling resistance and make it harder to ride.

To pump a bicycle tire, you will need a bicycle pump with the appropriate valve type (typically either Schrader or Presta) for your tire. Before pumping, check the recommended tire pressure, which is usually printed on the tire sidewall, and ensure the pump is set to the correct pressure level. Attach the pump to the valve, secure it in place, and start pumping with smooth, even strokes until the tire reaches the desired pressure. Disconnect the pump, check the pressure with a gauge if available, and repeat the process for the other tire if necessary.