The balloon tire frames had a frame change somewhere around 1959 and so did the middleweight frame. The two class frames were slightly different with the stay widths. Can I ask what you’re trying to figure out?
Thank you. Specifically, what I'm trying to find out is the exact differences between the 1955 Jaguar frame and the 1955 Corvette frame. I am interested in the evolution of the Jaguar but I am also interested in why Schwinn would have built 2 products in the same year that offered the same rear hub, the same brakes, the same fork (painted with the same pinstriping), and the same new rear fender/brake bracket just for the sake of having to reconfigure manufacturing to build a different frame. The tubing is the same on each bike, the geometry is the same. They must weigh the same. If the dimension between the seatstays is the same and the length of the new styled bridge brackets are the same, then they seem to be the same frame. The serial number series sequence is the same. Which raises the question for me, are they interchangeable?
The two bikes were "break-through" products. There was probably a little bit of risk exposure on the sales side. From the collections side, the '54-'55 Jaguar is probably a fairly desirable item. If the two 1955 frames are different, then that would further intensify the collectability of the Jaguar bike making it a "two year wonder". If they are the same, then they can be "forged" and I can make a Jag out of a Vette.
I'm just curious, that's all.