mpizzle421

Quick question for the riders..

I've been riding for the last 3-4 years or so (during good months in the midwest of course). I bought a Trek 7.2fx a few years back.

Been steadily riding since April of this year (I think I have 50 or so rides in). Generally speaking, I ride between 12-20 miles depending on how much time I have. I'm fortunate enough to have a nice trail near me. I get about 2 miles of compressed gravel, 10 miles of pavement, and then another few miles of gravel. No significant hills. Either minor incline or minor decline but it mostly appears to be flat. I clock in between 12 and 13mph on average but feel as though I should be much faster.

I was actually kicking around the idea of upgrading the bike but not sure what I should do. Assume the problem could be me as the engine as well. Any suggestions or thoughts?