Thanks Ghrumpy for the excellent back ground information. In the bottom Table 1. in the second column third down I am awaiting a (Loop type) frame, the silver bike in the pictures below, which appears to share some of the frame design features of the Cinelli shown above it as pointed out to me by another forum poster. I have previously had a (Mixed type) frame (Nishiki Olympic 12) and have just finished a (Parallel type) Fuji Absolute build for my grand daughter, her first full sized bike.