How to Convert a Pump A Web-site for Everyday Bicyclists. Getting Involved Library Position Papers Research and Source Documents .
Many folks never think ahead enough to bring a pump and patch kit.
How-To pages, and know exactly what to do. But if you are new to cycling, or more specifically new to hand pumps you may go for months with no problem and then get a flat 15 miles from nowhere. Almost all pumps are convertable between the only two types of valve stems used on bikes. You may have to convert yours before you use it depending on how it came from the manufacturer. There are two types of valve stems.