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I know this is well after you finalized your wheel/tire sizes, after all your trade studies.
I have a staggered set of Maya 3 piece 20's on my 2005 - 9" on front and 10" on back. The tires are Falken Azenis (Z rated) = 245-40 front and 275-35 back. They fill up the wheel wells pretty good. I did have to lift the rear a bit to keep from fender rub (inner and outer) - the rears are 12% taller than the stock tires - required speedo recalibration (so did my rear end gear ratio swap to 3.42).
View attachment 4246View attachment 4247
Believe it or not, these rims were
installed by the dealer at delivery in 2005 (Lund Cadillac - Phoenix) for a $9K premium! The tires have been replaced and are almost new (I have ~40K miles on the car now).
You wanted side photos (in another thread about the 3.42 gear ratio swap) - so here you go - in the wheels and tires section...
Let me know if you want additional details about offset or shots that show the tires relative to the fender (like your pictures).