That's not true. A 63cm Cannondale will measure 66cm C-T, same with a Klein. I've been duped plenty of times with those. I end up reselling a lot of 63cm Cannondales. What is so frustrating is even after asking the seller to give me the serial number and even telling him where to find it, they always say there isn't one. It always right where I said it was, and always the C'dales are 63s. The Klein I'm just an idiot. I bought it in person. I didn't even measure.