We can already hear you asking, “what's a valve stem?”  Well, it is one of the most important parts of your tires because of it's function and because it is a big potential problem area.  The valve stem is the bit that sticks out that allows you to add or remove air from the tire.  So, how often do you check yours? If you answered, “never,” then you're probably in the majority of Americans.  It is, after all, a very small part that is easy to forget, even if you regularly check your tires.  How [...more]