Filling the fenders with more rubber

Since the day I picked up my S80 T6, I've wanted to replace the 40-series tires on 18" Zubras with tires that would 1) be less likely do be damaged by curbs and potholes, 2) give a smoother ride on poorly maintained roads (which I encounter regularly), and 3) fill the visual gap between the tires and fenders, which is pretty large on the S80, no matter which wheel/tire option one has.

Lowering springs would fix only problem #3. So, I sold the Zubras, did some careful measuring of tires and fender clearances, and ordered Continental ContiProContact 225/60R17 tires mounted on Rial Flair 17x7.5" wheels with a 48 mm offset, and kept my fingers crossed. The result: smoother ride than even my 17" Yokohama snow tires, handling in normal driving seems little affected, and now the tires don't seem too small for the car. Now if my 2 year old daughter falls asleep in the carseat, her head won't be tossed around as much as with the other tires. Note that these tires JUST fit. Clearance behind the rear tires and fender liners are maybe 1/4", and the front tires have maybe 1/2" clearance to the bottom of the lower spring perches on the Macpherson struts. Speedometer error: 60 MPH on the speedometer is actually 64 MPH, according to my Garmin iQ3600 GPS unit. Odometer %error is also off by the same amount. Not a problem with me, now that I know what the %error is. I'm very happy with my "mod". Here's what it looks like (if Photobucket cooperates):