It's a 63cm. (I'm 6'5"). I took it for another ride today after moving the seat forward and downward about 1/2" and boy did it make a world of difference. I'm not as stretched out reaching for the hoods, and not nearly as saddle sore from over-extending with my legs. I even got fitted when I picked up the bike, but I think he was in a hurry as the shop was really busy and did a lame job. The prologo kappa actually felt ok today. Maybe I just need to get used to it. Next I'm going to add Continental GP4000's and am still deciding on what type of tubes I want to stock up on. Any suggestions on tubes under $10? I'm currently running some cheap Avenir tubes and think I could drop probably 100grams just from lighter tubes. The bike is currently weighing 19.5lbs with pedals, cages, comp. I know it won't be a feather since it's a large frame but would like to trim it down, especially in areas that are affordable performance returns. Any suggestions on tubes?