Personally, I think bike magazines are a waist of time and money if your intent is to learn more about cycling in general. They rarely have any useful articles for real world riders and the focus seems more on selling you more products rather than education.
This site and many other similar bike forums will serve your needs better than pages out of any bike magazine with the exception of some cycling related books. An example of a good cycling book is the Park Tool's "Big Blue Book" if you want to learn more about bike maintainence.