I ordered my Spyder (in June) and now I'm looking at accessories. Do you have to order the rear rack if you want the backrest? It looks like they work together. Thanks in advance for your comments.
Based on information given the dealers, you' are correct.
You'll need to buy:
219400081, Rear Sport Rack - Silver: MSRP $399.99
219400082, Adjustable Backrest: MSRP $249.99
It seems to have to do with the seat. Since the seat opens to allow access to the gas tank, apparently for strength, the designer opted to mount the rack to the frame and the backrest to the rack (rather than to the seat).
The dealer I talked to said that was what he had been told, but had not seen one yet.