The Schwinn Stingrays success was similar that of the GTO in that , within a short time, all other manufacturers had their own version,or copy of it.
Each year Schwinn changed something just like the car manufacturers did.
The pic in the above post is the '68 version. For '69 Schwinn changed some things on the Krates. They eliminated the pogo type front seat mount, added a front fender, changed the style of the shifter handle to a horizontal set up, went to a matching color seat, and switched to a cheater slick on the rear. There was also a new color for '69 green and that version was known as the "Pea Picker". You can remember how popular green was in the late 60s on cars, esp Pontiacs.
Here are a few '69 versions.
These were expensive bikes at around $100! I wanted one so bad but, would not even ask my parents for one because I thought it was too expensive. They were, by far, the nicest, classiest bikes of the era and they were built very well too. They combined the best of the dragster look, custom look and chopper look.