I am a 52 year old 300 pounder and broke a bone in my foot in March. I decided to get into biking after sitting on my butt for 3 months trying to get my foot to heal. I purchased a used Trek 7300 after a lot of research and I must admit I really enjoy riding! I started off at 2 miles a day and within a couple weeks I was at 50-60 miles a week which is where I am now. It seems like I can't get past the ten mile mark in a day. I was also a long time smoker. I am having trouble getting my average speed past 10.5 which I know is very slow. Most adult riders pass me on the bike path. I also can't seem to lose much weight, which I 'm sure would pick up my speed. Any advice would be greatly appreciated!