One of the things I found with submitting photos (regardless of quality etc) was that usually they have a theme in mind, or develop a theme, which is a mystery and if your submitted photos don’t tie in with it then they’re unlikely to make it in the mag.
I don’t know what’s in this month’s, but my recent decent photos are all snowy ones and they don’t usually fit in to the whole dreamy endless singletrack and/or supremely lush, technical trails shots the bike mags like to publish.
(I should caveat all that with: I haven’t tried submitting for years now; and my ‘decent’ shots may still not be ‘publishable’. 🙂 )