From the Soul Cycles website:
The new Dillinger G4 is now in stock. The frames are available in the old finishes (pearl white, pearl root beer brown, and brushed with clear) as well as a new pearl blue. The frames are identical to the G3 with the exception of new set CNC machined set screw housing. Unfortunately we have early requests for approximately 80 more frames than we have on hand. If you are on the early frame notification list we will be emailing you in the upcoming week and you will have first priority. We also have a new batch already going into production.