Hi there. I'm new to cycling and bought a Trek7.5FX a few months back. I waited to make any changes until I found out how the bike felt and how I was going to use it. Well, I love it. I love the bike and it turns out I was a closeted cyclist all of these years. I'll be buying a proper road bike next year for doing some group riding, but meanwhile I want to make some modifications to this hybrid. I'm considering going with 28c tires in place of the 32c that come on the bike. Does this seem like a modification that will cut weight and increase speed? The other thing I'd like to do is change/modify the handlebars in order to pick up at least one additional and tucked-in or lowered position. This is purposed with decreasing drag, especially on really windy days. I'm considering either bar ends or a whole new bar with bullhorns (similar to what Trek put on the 7.9FX). I'd love any and all input! Thanks a lot.