Two small dents on frame as shown in the pictures. 54.5 top bar to bottom bracket. The top tube 52cm is measured horizontally from the top tube/head tube junction to the seat tube. The hangar has an attachment issue it may just need new bolts otherwise all 105 set working as designed. I’ve had this bike over 20 years it has done a good few miles. This early Cannondale frames were guaranteed for life and the frame has not had any serious knocks or accidents. If you are interested in the frame or groupset. Separately please contact me with a reasonable offer.