Originally Posted by corwin1968

I just now saw this post.

The one on the left is a 19" frame with an approximately 48cm seat-tube and 55-56cm effective top-tube. I bought it new in 1995 and road it for 12 years, never realizing it was way too small!!

The one on the right is a 21" frame with a 53.5cm seat-tube and a 57cm effective top-tube. I bought it on the day I took that photo and rode it for a year or so before buying a brand new frameset. It's also too small in the vertical plane (too much seatpost and stem sticking up) but about the right size in the horizontal plane. The next larger size, a 23" I believe, would be about right in height but with a way too long top-tube. Those old Multitracks have MTB geometry with relatively longer top-tubes compared to road bikes.