In my experience, postwar 26in schwinn ballooners are the same, girls or boys. Prewar are different, boys being shorter than girls. I don't know about rods that come off the midweights. Is your spitfire a balloon or midweight? Is the set that doesn't fit the spitfire too short or too long? I have one set that is about 1/2in too short for my postwar ballooners and I don't know what it is for. :shock: It might be for a 24 in or prewar boys 26in... :?: