I bought my Trek 4300 3 years ago and use it on occasion..id say about once a week for running the occasional errand, and about once every other week for bike path/exercise.
This spring/summer I want to bike more for weight loss purposes, as well as have a bike that I can ride in the city, going over mini-curbs, streetcar tracks, sewer grates, minor potholes - Id try to avoid these but sometimes its impossible! I don't go off-trail much.
The problem with my Trek 4300 is that i find it a bit slow and clunky - although for weight loss purposes I assume thats a good thing since I have to peddle harder and burn more calories?
This is my first bike,- It does handle bumps/curbs quite well......But I wonder how a bike with no-suspension feel like?
Another problem is that last 2 weeks I biked for 1 hr and midway during biking, my lower back started to hurt...I don't know if that means my positioning was wrong, or that the bike was not a proper fit.
Anyway, I've been doing some research on the internet and was wondering if a Trek 7.X FX would be appropriate for my needs? I still need to go to the LBS to try them on for size and comfort, but I'd like to have a general idea of what models I should be looking at.