Good thread. I started riding last year and have lost about 60 pounds so far. I'm still 40 pounds from my goal. I was riding a wallyworld bike and it ended bad when the rear wheel came apart. The spokes came apart 3 miles from the house. I bought a Jamis DXT comp and havent looked back. I upgraded the seat to be able to ride more than 100 yards. My standard circuit is 13.25 miles I started with 3 miles and it took several months to get to 13. Sometimes I do two laps for 26 miles and that really is tough. I ride at an average of 13 mph counting stops for traffic. Overall the biking is great and I feel better after riding.
I've enjoyed reading this thread even though I don't ride. The roads around here are mostly country and terrifying at the thought of sharing them with the cars. There are some trails around I might check out as I enjoy trail riding. I need a new bike though.