Since the display of rear derailleurs was first introduced to BikeCAD, whether or not a bike would include a derailleur was determined by whether or not the rear dropout had a derailleur hanger. With recent developments in drivetrain technology, the absence of a derailleur hanger no longer means the bike doesn't include a derailleur. In BikeCAD version 20.0 there is now an include checkbox in the rear derailleur section which ultimately dictates whether or not a derailleur is used. If the design does not include a derailleur hanger, the derailleur will be mounted to the rear axle. As always, the actual display of the rear derailleur can be turned on and off with the eyeball icon.
Bicycle Design Software
