I got my CAAD8 about 6 months ago. I replaced the 23mm tires with 25mm tires and it rides smooth and plush without any noticeable difference in speed. If you want to do centuries on it, you could also add a Brooks B-17 leather saddle. Santa gave me one for Christmas and I tried it for a day and it was definitely more comfortable than the stock racing saddle I had on. It absorbs even more shock from the road bumps. But I did not like the retro clunky look of the B-17 on the modern sleek CAAD8. I went back to my stock saddle but will go back to the B-17 when I train for centuries instead of my short 30-40 mile weekend rides.