@punkture on my frames, the CM size was on the bottom of the downtube top lug, approximately where the arrow is in this photo. But, it was really hard to see under the paint. You'll need to flip the frame and probably take the wheel out.
Alas, I had to part with mine as they were just too aggressive. The frame in the photo is a 52cm and I'm 5'8". I've got a 30" inside leg measurement and the saddle / bar drop was a lot for more than an hour in the saddle.
@punkture on my frames, the CM size was on the bottom of the downtube top lug, approximately where the arrow is in this photo. But, it was really hard to see under the paint. You'll need to flip the frame and probably take the wheel out.
Alas, I had to part with mine as they were just too aggressive. The frame in the photo is a 52cm and I'm 5'8". I've got a 30" inside leg measurement and the saddle / bar drop was a lot for more than an hour in the saddle.