I have a late-2014 Model S and have been "living with" the classic/original silver 19" wheels all along. A rather ordinary look for a P85D with red calipers too. Tesla Shop Online has always had the 21" grey turbines (with tires) but, I'm not interested in the thin sidewall, harsher ride, high maintenance, etc. Didn't dive into aftermarket options as I don't want any sort of headaches with Tesla service. Hadn't opened the Model S design studio in a long time; tried it today to see the 19" Grey Slipstream wheels being available for $2,500 for a new config. Has anyone tried to order and install these at a service center? Please let me know. Thanks in advance.