[Willows]

Serial 1 shows how to properly pump up your bike's tires through the Presta valve stem that's standard on all bikes.

 

[Dalton07]

As a responsible cyclist, it is essential that you know how to use a bicycle pump so as not to damage your tires. You can use a Presta valve or a Schrader valve. Determine the proper pressure range your tires need to be inflated to. A typical road bike needs 80 psi-130 psi, while a mountain bike needs 25 psi-35 psi. Before inflating your bike, make sure that there are no dust caps or plastic caps around the bike valve.