I own an older hybrid Trek 7500 FX, aluminum. Probably not the same style of FX that you are considering. FWIW, it is my "beater bike." The one I take on limestone trails, in the rain.... It is quite heavy compared to my road bike but it takes repeated abuse and just keeps going. Notwithstanding how heavy it is and it's wider tires, I actually did a couple of MS-150s on this bike, and survived both.