Ok so far you guys have been very helpful and I know there is alot of experience out there. I am 56 years old and presently weigh 190 lbs. I have been cycling for a little over a year. I started cycling after having 4 way bypass surgury. I was 225 lbs and started with a Trek hybrid bike, after 6 months I bought a Felt Z100 road bike. I have ridden about 1500 miles in a year. My frustration is that I can not seem to average more than 16 to 16.5 miles per hour. The only reason I want to pick up my average is so I can go on group rides. I have joined some group rides, but I usually get dropped, because it seems I need to be around 17.5 to 18. I enjoy group rides for the fellowship, safety, and I have learned alot, but it does get very frustrating not being able to keep up the pace. I do have a cycleops trainer I have used it to try and keep in condition. I even demoed a Trek 2.0 Domane this weekend with not any better results, other than my top speeds. I was considering getting a carbon frame to see if that would give me the little extra so I could continue to join the group rides. I respect all of your experience out there.....any suggestions. I really to love to ride and group rides push me to go more miles! Would also like to know if there is anything I can do to the Felt Z100 ie. wheels, tires etc. that might help give me a little extra, I would appreciate that input also. Thanks!