So I've been a smoker for 21 years, am 6'1" tall and weigh 225 lbs (fat and out of shape), and just quit smoking and bought my first road bike on May 2. It's a 2006 Trek 1000 SL. I've never exercised, but I have a neighbor that's been riding for years. I remember my first few days riding I was able to go anywhere between 2-5 miles and thought I was going to die. I'm now up to 25-30 miles a day, 4-5 days a week. I absolutely love it! My biggest problem right now is that I cannot, for the life of me, average above 13mph! I do have some red lights that I know are affecting my speed, but is this normal? I really want to start on some group rides, but 13mph is not going to cut it. My neighbor says I'm doing good, but he's also my neighbor and I can't tell if he's just being nice or not. Also, my ass is killing me! I'm wearing the padded Canari shorts and have adjusted my seat a few times, so it's a little better now, but still not good. I can't imaging trying to go 60 miles like this. WIll I get used to it or do I need to start looking at seats? Anyways, I appreciate any help and advice I can get!