What are the different adapters for?

Schrader valves (cars, motorcycles and mountain bikes) can be attached directly to the air chuck without any additional attachments. Presta valves are commonly used on road bikes and some mountain bikes. To inflate a bicycle tire, you will need to use the Presta valve adapter. Inflate all kinds of sports balls with the Sports ball needle. Inflate small plastic or rubber inflatables such as pool rings, beach balls, air mattresses, travel pillows and more with either of the two provided tapered nozzles.