It is the black wheels with red calipers that they charge the extra for--not the rubber.
You are paying almost $400 for a little bit of paint, why I opted to not go that route.
I would rather put that coin into aftermarket black wheels (which I actually LOVE the aesthetics of), as I did, and the red calipers could be done easily/cheaply enough if desired, and maybe even better than the factory did, since many have burnt that paint clean off of their red factory calipers when open tracking.