The wheels on a stock Fuji track are crap. I weigh a little less than you and my commute had me going over a half dozen sets of railroad tracks. Almost every day I had to retrue the wheels.
I finally built my own set of wheels with Harris hubs, Mavic Open Sport rims and DT spokes. They've been perfect ever since.
This was my first time building bicycle wheels, although I have built motorcycle wheels before, they were relatively simple following the instructions on Sheldon Brown's website. You can probably buy wheels cheaper, but I like doing things myself. But the bottom line is that handbuilt decent wheels are simply going to be stronger than the cheapo crap they put on inexpensive bikes these days.
Az